I’m not asking you to believe in UR. Im wondering if you might be demanding some perfection in understanding from your brother that even YOU don’t possess.
I also think you should be more careful with your judgement of unbelievers since we were told not to judge those outside and also to not judge anything before the time. So I think you’re reaching above your station.
If your daughter wanted to spend the night with a friend and you had heard from other parents that this girl was a drug user, would you be judging that girl by not allowing your daughter to go with her, or would you be using common sense?
I think I'm using common sense!