Must Muslims be just to non-Muslims and even to enemies?

The evidence

1. 1

   Quran Al-Maaida · 5:8

   Do not let hatred of a people prevent you from being just; justice is nearer to righteousness.

   يَٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُواْ كُونُواْ قَوَّٰمِينَ لِلَّهِ شُهَدَآءَ بِٱلۡقِسۡطِۖ وَلَا يَجۡرِمَنَّكُمۡ شَنَـَٔانُ قَوۡمٍ عَلَىٰٓ أَلَّا تَعۡدِلُواْۚ ٱعۡدِلُواْ هُوَ أَقۡرَبُ لِلتَّقۡوَىٰۖ وَٱتَّقُواْ ٱللَّهَۚ إِنَّ ٱللَّهَ خَبِيرُۢ بِمَا تَعۡمَلُونَ ۝٨

   O you who have believed, be persistently standing firm for Allah, witnesses in justice, and do not let the hatred of a people prevent you from being just. Be just; that is nearer to righteousness. And fear Allah; indeed, Allah is Acquainted with what you do

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2. 2

   Quran Al-Mumtahana · 60:8

   Allah does not forbid kindness and justice toward non-Muslims who do not fight you; He loves the just.

   لَّا يَنۡهَىٰكُمُ ٱللَّهُ عَنِ ٱلَّذِينَ لَمۡ يُقَٰتِلُوكُمۡ فِي ٱلدِّينِ وَلَمۡ يُخۡرِجُوكُم مِّن دِيَٰرِكُمۡ أَن تَبَرُّوهُمۡ وَتُقۡسِطُوٓاْ إِلَيۡهِمۡۚ إِنَّ ٱللَّهَ يُحِبُّ ٱلۡمُقۡسِطِينَ ۝٨

   Allah does not forbid you from those who do not fight you because of religion and do not expel you from your homes - from being righteous toward them and acting justly toward them. Indeed, Allah loves those who act justly

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3. 3

   Quran Al-Maaida · 5:42

   If you judge between them, judge with justice; Allah loves the just.

   سَمَّٰعُونَ لِلۡكَذِبِ أَكَّٰلُونَ لِلسُّحۡتِۚ فَإِن جَآءُوكَ فَٱحۡكُم بَيۡنَهُمۡ أَوۡ أَعۡرِضۡ عَنۡهُمۡۖ وَإِن تُعۡرِضۡ عَنۡهُمۡ فَلَن يَضُرُّوكَ شَيۡـࣰٔ اۖ وَإِنۡ حَكَمۡتَ فَٱحۡكُم بَيۡنَهُم بِٱلۡقِسۡطِۚ إِنَّ ٱللَّهَ يُحِبُّ ٱلۡمُقۡسِطِينَ ۝٤٢

   [They are] avid listeners to falsehood, devourers of [what is] unlawful. So if they come to you, [O Muhammad], judge between them or turn away from them. And if you turn away from them - never will they harm you at all. And if you judge, judge between them with justice. Indeed, Allah loves those who act justly

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4. 4

   Tafsir Al-Mukhtasar fi Tafsir al-Quran · 5:42

   Judge with justice even though they are unfair and your enemies.

   These Jews frequently listen to lies and consume unlawful wealth, such as usury. If they bring a case before you for judgement, O Messenger, then pass judgement between them if you wish, or leave off passing judgement if you so wish – you have the option of doing either of these. If you choose not to pass judgement, they will not be able to harm you in any way. If you do pass judgement, then do so with justice, even though they themselves are unfair and are your enemies. Allah loves those who are just in their judgements, even though the case is between those who are the judge’s enemies.

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5. 5

   Quran An-Nisaa · 4:105

   Judge by what Allah has shown you, and do not be an advocate for the deceitful.

   إِنَّآ أَنزَلۡنَآ إِلَيۡكَ ٱلۡكِتَٰبَ بِٱلۡحَقِّ لِتَحۡكُمَ بَيۡنَ ٱلنَّاسِ بِمَآ أَرَىٰكَ ٱللَّهُۚ وَلَا تَكُن لِّلۡخَآئِنِينَ خَصِيمࣰ ا ۝١٠٥

   Indeed, We have revealed to you, [O Muhammad], the Book in truth so you may judge between the people by that which Allah has shown you. And do not be for the deceitful an advocate

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6. 6

   Hadith Sahih al-Bukhari 3166

   Sahih Bukhari

   Whoever kills a person under treaty with the Muslims will not smell the fragrance of Paradise.

   Narrated `Abdullah bin `Amr:The Prophet (ﷺ) said, "Whoever killed a person having a treaty with the Muslims, shall not smell the smell of Paradise though its smell is perceived from a distance of forty years

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   العربية

   حَدَّثَنَا قَيْسُ بْنُ حَفْصٍ، حَدَّثَنَا عَبْدُ الْوَاحِدِ، حَدَّثَنَا الْحَسَنُ بْنُ عَمْرٍو، حَدَّثَنَا مُجَاهِدٌ، عَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍو ـ رضى الله عنهما ـ عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ ‏ "‏ مَنْ قَتَلَ مُعَاهَدًا لَمْ يَرَحْ رَائِحَةَ الْجَنَّةِ، وَإِنَّ رِيحَهَا تُوجَدُ مِنْ مَسِيرَةِ أَرْبَعِينَ عَامًا ‏"‏‏.‏

7. 7

   Hadith Sahih Muslim 2577

   Sahih Muslim

   Allah has forbidden oppression for Himself and made it forbidden among people.

   Abu Dharr reported Allah's Messenger (ﷺ) as saying that Allah, the Exalted and Glorious, said:"O My servants, I have forbidden oppression for Myself and have made it forbidden amongst you, so do not oppress one another. O My servants, all of you are astray except for those I have guided, so seek guidance of Me and I shall guide you, O My servants, all of you are hungry except for those I have fed, so seek food of Me and I shall feed you. O My servants, all of you are naked except for those I have clothed, so seek clothing of Me and I shall clothe you. O My servants, you sin by night and by day, and I forgive all sins, so seek forgiveness of Me and I shall forgive you. O My servants, you will not attain harming Me so as to harm Me, and will not attain benefitting Me so as to benefit Me. O My servants, were the first of you and the last of you, the human of you and the jinn of you to be as pious as the most pious heart of any one man of you, that would not increase My dominion in anything. O My servants, were the first of you and the last of you, the human of you and the jinn of you to be as wicked as the most wicked heart of any one man of you, that would not decrease My dominion in anything. O My servants, were the first of you and the last of you, the human of you and the jinn of you to rise up in one place and make a request of Me, and were I to give everyone what he requested, that would not decrease what I have, any more that a needle decreases the sea if put into it. O My servants, it is but your deeds that I record for you and then recompense you for. So let him who finds good, praise Allah, and let him who finds other than that blame no one but himself." Sa'id said that when Abu Idris Khaulini narrated this hadith he knelt upon his knees

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   العربية

   حَدَّثَنَا عَبْدُ اللَّهِ بْنُ عَبْدِ الرَّحْمَنِ بْنِ بَهْرَامَ الدَّارِمِيُّ، حَدَّثَنَا مَرْوَانُ، - يَعْنِي ابْنَ مُحَمَّدٍ الدِّمَشْقِيَّ - حَدَّثَنَا سَعِيدُ بْنُ عَبْدِ الْعَزِيزِ، عَنْ رَبِيعَةَ بْنِ يَزِيدَ، عَنْ أَبِي إِدْرِيسَ الْخَوْلاَنِيِّ، عَنْ أَبِي ذَرٍّ، عَنِ النَّبِيِّ صلى الله عليه وسلم فِيمَا رَوَى عَنِ اللَّهِ، تَبَارَكَ وَتَعَالَى أَنَّهُ قَالَ ‏ "‏ يَا عِبَادِي إِنِّي حَرَّمْتُ الظُّلْمَ عَلَى نَفْسِي وَجَعَلْتُهُ بَيْنَكُمْ مُحَرَّمًا فَلاَ تَظَالَمُوا يَا عِبَادِي كُلُّكُمْ ضَالٌّ إِلاَّ مَنْ هَدَيْتُهُ فَاسْتَهْدُونِي أَهْدِكُمْ يَا عِبَادِي كُلُّكُمْ جَائِعٌ إِلاَّ مَنْ أَطْعَمْتُهُ فَاسْتَطْعِمُونِي أُطْعِمْكُمْ يَا عِبَادِي كُلُّكُمْ عَارٍ إِلاَّ مَنْ كَسَوْتُهُ فَاسْتَكْسُونِي أَكْسُكُمْ يَا عِبَادِي إِنَّكُمْ تُخْطِئُونَ بِاللَّيْلِ وَالنَّهَارِ وَأَنَا أَغْفِرُ الذُّنُوبَ جَمِيعًا فَاسْتَغْفِرُونِي أَغْفِرْ لَكُمْ يَا عِبَادِي إِنَّكُمْ لَنْ تَبْلُغُوا ضَرِّي فَتَضُرُّونِي وَلَنْ تَبْلُغُوا نَفْعِي فَتَنْفَعُونِي يَا عِبَادِي لَوْ أَنَّ أَوَّلَكُمْ وَآخِرَكُمْ وَإِنْسَكُمْ وَجِنَّكُمْ كَانُوا عَلَى أَتْقَى قَلْبِ رَجُلٍ وَاحِدٍ مِنْكُمْ مَا زَادَ ذَلِكَ فِي مُلْكِي شَيْئًا يَا عِبَادِي لَوْ أَنَّ أَوَّلَكُمْ وَآخِرَكُمْ وَإِنْسَكُمْ وَجِنَّكُمْ كَانُوا عَلَى أَفْجَرِ قَلْبِ رَجُلٍ وَاحِدٍ مَا نَقَصَ ذَلِكَ مِنْ مُلْكِي شَيْئًا يَا عِبَادِي لَوْ أَنَّ أَوَّلَكُمْ وَآخِرَكُمْ وَإِنْسَكُمْ وَجِنَّكُمْ قَامُوا فِي صَعِيدٍ وَاحِدٍ فَسَأَلُونِي فَأَعْطَيْتُ كُلَّ إِنْسَانٍ مَسْأَلَتَهُ مَا نَقَصَ ذَلِكَ مِمَّا عِنْدِي إِلاَّ كَمَا يَنْقُصُ الْمِخْيَطُ إِذَا أُدْخِلَ الْبَحْرَ يَا عِبَادِي إِنَّمَا هِيَ أَعْمَالُكُمْ أُحْصِيهَا لَكُمْ ثُمَّ أُوَفِّيكُمْ إِيَّاهَا فَمَنْ وَجَدَ خَيْرًا فَلْيَحْمَدِ اللَّهَ وَمَنْ وَجَدَ غَيْرَ ذَلِكَ فَلاَ يَلُومَنَّ إِلاَّ نَفْسَهُ ‏"‏ ‏.‏ قَالَ سَعِيدٌ كَانَ أَبُو إِدْرِيسَ الْخَوْلاَنِيُّ إِذَا حَدَّثَ بِهَذَا الْحَدِيثِ جَثَا عَلَى رُكْبَتَيْهِ ‏.‏