Islam is the religion of justice, equality, and manners

Al-Hujurāt (The Private Quarters)

يَا أَيُّهَا الَّذِينَ آَمَنُوا لَا يَسْخَرْ قَومٌ مِنْ قَوْمٍ عَسَى أَنْ يَكُونُوا خَيْرًا مِنْهُمْ وَلَا نِسَاءٌ مِنْ نِسَاءٍ عَسَى أَنْ يَكُنَّ خَيْرًا مِنْهُنَّ وَلَا تَلْمِزُوا أَنْفُسَكُمْ وَلَا تَنَابَزُوا بِالْأَلْقَابِ بِئْسَ الِاسْمُ الْفُسُوقُ بَعْدَ الْإِيمَانِ وَمَنْ لَمْ يَتُبْ فَأُولَئِكَ هُمُ الظَّالِمُونَ {١١}

O you who believe, let not some men ridicule others, for it may be that they are better than them; nor let some women ridicule others, for it may be that they are better than them. Do not speak ill of one another, nor call one another by [offensive] nicknames. How evil is the name of wickedness after having faith! And whoever does not repent, it is they who are the wrongdoers.

يَا أَيُّهَا الَّذِينَ آَمَنُوا اجْتَنِبُوا كَثِيرًا مِنَ الظَّنِّ إِنَّ بَعْضَ الظَّنِّ إِثْمٌ وَلَا تَجَسَّسُوا وَلَا يَغْتَبْ بَعْضُكُمْ بَعْضًا أَيُحِبُّ أَحَدُكُمْ أَنْ يَأْكُلَ لَحْمَ أَخِيهِ مَيْتًا فَكَرِهْتُمُوهُ وَاتَّقُوا اللَّهَ إِنَّ اللَّهَ تَوَّابٌ رَحِيمٌ {١٢}

O you who believe, avoid much suspicion, for some suspicions are sin. Do not spy on one another, nor backbite one another. Would any of you like to eat the flesh of his dead brother? You would surely abhor it. So fear Allah. Indeed, Allah is Accepting of Repentance, Most Merciful.

يَا أَيُّهَا النَّاسُ إِنَّا خَلَقْنَاكُمْ مِنْ ذَكَرٍ وَأُنْثَى وَجَعَلْنَاكُمْ شُعُوبًا وَقَبَائِلَ لِتَعَارَفُوا إِنَّ أَكْرَمَكُمْ عِنْدَ اللَّهِ أَتْقَاكُمْ إِنَّ اللَّهَ عَلِيمٌ خَبِيرٌ {١٣}

O people, We have created you from a male and a female, and made you into nations and tribes so that you may recognize one another. Indeed, the most noble of you before Allah is the most righteous among you. Indeed, Allah is All-Knowing, All-Aware.