My brother has a non Muslim gf
Salaam,
I am a little confused how to go about this. My little brother recently told me he has a gf who is not Muslim, she is most likely agnostic at this point. Apparently she has voiced to him that she is interested in learning more about Islam because he told her he cannot eventually marry her if she is not Muslim. I've decided I'll answer any questions she has about Islam since she is worried about going to a masjid as she is afraid of judgement since she has tattoos and piercings.
My issue is that my brother does not understand why my mom is mad about him dating her. He says he can make his own decisions and he won't break up with her now bc he doesn't want to and the future if she doesn't convert he'll break up with her (idk what his timeline is). In my opinion he just wants to date her and wants us on board which we obviously won't be. I told him I won't support the relationship because it's haraam and I wouldn't support it even if she was Muslim (I'd probably get them to do their nikkah if she was Muslim). My other siblings and I, are all married and he's the baby of the family and he said that we brought home our significant others and my mom accepted them. The thing he's not understanding is that we all had jobs and all our partners were Muslim and we brought them home with the intention of marriage and we got married pretty quickly after the parents met.
What can I do to help my mom because she is very upset but does not believe in kicking out her son over this. And what can I do to help my brother because it seems that he has no intention of breaking up with the girl and is adamant that she's interested in Islam. I told him I'd talk to her and answer her questions but aside from that how can I tell him to not date her...
Thanks in advance for any advice!