Should I help or mind my own business.

Hope this is the right place for this. I am a proud support of everyone being who they want to be. Okay so my mom's best friends daughter is 17F and recently said that she wants to be called Bob (fake name) and use he/him pronouns. His family is pretty religious. His mom calls him the thing and grandma refuses to call him Bob or use his pronouns. So he has no support. Should I get in touch with Bob and let him know that someone support him during this hard time or do I stay out of it. My husband says let it go and I say be there for him. Any advice is welcomed. Thank you