Supplication of the kaafir

Just becasue someone is a kaafir does not give you the right to wrong him. Beware of even the supplication a kaafir makes against you if you wrong him.

عن أنس رضي الله عنه أن رسول الله صلى الله عليه وسلم قال : اتَّقُوا دَعْوَةَ الْمَظْلُومِ وَإِنْ كَانَ كَافِرًا فَإِنَّهُ لَيْسَ دُونَهَا حِجَابٌ

Yes, even the supplication of the kaafir when he is wronged is heard. It is devastating. Do not wrong anyone even if it be a kaafir.