Short answer: If they don’t know anything else about you except you’re “Christian”, they don’t know if you’re like a left-wing unitarian or a horrible “conversion therapy, make being trans a felony” evangelical. The former is pretty safe, but if you’re the latter hanging out with you could be dangerous.

Longer thoughts: Many christians are not good about queer topics. This can include “we should torture them” (“conversion therapy”), laws that make life harder for them (eg: banning marriage), and lower grade unpleasantness like “i’ll pray so you don’t go to hell”.

Many christians also don’t really do much to stop their peers. It’s not really your responsibility to fight everyone on every topic, but if you keep going to a church that wants to oppress queer people, you’re supporting something that’s hostile. I don’t care how nice their pastor is or how much fun the choir group is, if the church wants to rip apart my friend’s families and you support that, we can’t be friends. Find another church.

Lastly, and this is more general and less about queer folks, most christians are not very good at it. The bible has lots of stuff about love your neighbor (and your neighbor includes your out-group) and not fixating on material wealth, but I see a lot of so-called christians doing squat for the homeless and vulnerable, voting for cruelty, and sitting around in their nice house with their big screen tv. (All that prosperity gospel, “sin all you want and be forgiven” stuff seems like nonsense.