Suffering inflicted to delegates wishing to convert to Islam

وَهُمْ يَنْهَوْنَ عَنْهُ وَيَنْـَٔوْنَ عَنْهُ ۖ وَإِن يُهْلِكُونَ إِلَّآ أَنفُسَهُمْ وَمَا يَشْعُرُونَ

Others they keep away from it, and themselves they keep away; but they only destroy their own souls, and they perceive it not.

وَٱلَّذِينَ يُحَآجُّونَ فِى ٱللَّهِ مِنۢ بَعْدِ مَا ٱسْتُجِيبَ لَهُۥ حُجَّتُهُمْ دَاحِضَةٌ عِندَ رَبِّهِمْ وَعَلَيْهِمْ غَضَبٌۭ وَلَهُمْ عَذَابٌۭ شَدِيدٌ

But those who dispute concerning Allah after He has been accepted,- futile is their dispute in the Sight of their Lord: on them will be a Penalty terrible.