gay brother is trying to change himself through religion

Hi everyone,I'm just here seeking some help. My brother has told me he's gay and I've been trying to be supportive as to me his sexuality does not change the way I see him or how much I love him. But our family is quite religious (he and I used to be the only atheists). After considering coming out to the rest of family and generally being observant of their reaction to marriage equality debates, he's now decided that being gay is wrong and it's a temptation he has to fight... and has become religious.I'm all for whatever makes him happy, but I'm worried that this way of thinking will damage him. He's even saying he's now against homosexuality all together, and that having such feelings was just his test that he has to overcome.I guess I'm looking for some advice from anyone who may have been in a similar situation. I don't want to be so closed minded as to think that what he's doing is wrong, each to their own. All I'm doing right now is again trying to be supportive rather than push my own views of how damaging religion I think is. But it just worries me for the sake of his mental health. Any advice is welcome. Thanks.