Hesitation about praying behind those in whose lands religious innovations (bid'ah) are widespread

Question:
Honorable Shaykh, may Allah grant you success. He says: Some of the brothers hesitate to pray behind some people in whose lands religious innovations (bid'ah) and acts of shirk (associating partners with Allah) are widespread, and they say: We fear that these people are like them.

Answer:
The verse is about having the best opinion of your Muslim brothers, as long as it has not become clear to you, or established with you, that something is contrary to this. As for the default regarding a Muslim, it is that he is upright and that one has a good opinion of him.