Typically wrestling categories are very strictly defined by weight of participants. Someone of 6’5” and 230b would only be asked to wrestle someone of the same size. His coaches are strange asking him to wrestle smaller people. It’s dangerous.

But even if these girls were miraculously of the same weight and height, it’s perfectly fine for him not to wrestle women if it’s against his belief . I understand you don’t practice Islam but he does, so I’d respect that

You can’t change other people’s views and beliefs. As long as he’s not mistreating you, I see no reason for you trying to change his views.

To all honesty some of the views your brother expresses are very mature. He has beliefs but isn’t imposing them on others. Like he’s against abortions but wouldn’t make it into a law because he doesn’t want to control women. That’s respectful

I think maybe you can learn something from his way of handling thungs. You can have your beliefs but you don’t have to impose them on others.