Read and reflect on verse 857 from Surah Al-An'aam: NOW, whenever thou meet such as indulge in [blasphemous] talk about Our messages, turn thy back upon them until they begin to talk of other things and...
وَإِذَا رَأَيْتَ الَّذِينَ يَخُوضُونَ فِي آيَاتِنَا فَأَعْرِضْ عَنْهُمْ حَتَّىٰ يَخُوضُوا فِي حَدِيثٍ غَيْرِهِ ۚ وَإِمَّا يُنْسِيَنَّكَ الشَّيْطَانُ فَلَا تَقْعُدْ بَعْدَ الذِّكْرَىٰ مَعَ الْقَوْمِ الظَّالِمِينَ
NOW, whenever thou meet such as indulge in [blasphemous] talk about Our messages, turn thy back upon them until they begin to talk of other things and if Satan should ever cause thee to forget [thyself], remain not, after recollection, in the company of such evildoing folk,