Sorry for the wall of text, TLDR at bottom

Using a throwaway for this post but hi! I’m a trans girl (21) and my gf is cis (22). When we met I wasn’t out, but eventually I came out to her and she’s been nothing but kind and accepting! But some of her friends don’t seem to be. We’re long distance currently, so I haven’t talked to her friends very much besides a few interactions on Instagram, but one night my girlfriend messaged me upset about what her friend had said. We’ll call this friend Josh. She didn’t go into details but she said that Josh was ranting about the whole Super Straight movement and was bagging on trans people really badly and saying hateful things. It made my gf upset, she called Josh out on this but he didn’t stop, so she just hung up on him. 

I tried not to sound too upset at the moment but I’m not gonna lie it kinda sucked knowing that one of my gf’s close friends was hating on people like me for seemingly no reason. I bought this up to my girlfriend awhile after this happened and asked something along the lines of “sooo does Josh not like trans people?” and she basically brushed it off, saying Josh was just saying that stuff because he was in a toxic relationship at the time and he’s actually sweet. I try not to judge, I’ve been in bad relationships myself. But I’ve never used my bad relationship to say hateful things about an entire group of people. Josh has also treated my gf pretty badly multiple times in the past but they’ve always seemed to make up so I guess I won’t go into details about their past issues. However my impression of this person based on everything I've heard isn't exactly a great one.

Anyways my gf and Josh are still friends and hang out somewhat often. Whenever my gf is hanging with her friends she’ll send me pics but every time I see a pic of her with Josh I cringe a little. I imagine having to meet Josh one day, being at my gf’s party or something and him being there, and I feel like it’s always going to be in the back of my mind that he doesn’t like trans people and he’s gonna think of me as weird or lesser. It just bothers me knowing my gf is so buddy buddy with him after he’s apparently said hateful things about trans people multiple times. Especially after my gf called him out for it and they apparently didn't back down from the things they were saying.

Am I over reacting / over thinking here? I don’t complain to my gf about this because he’s been friends with her for awhile and the one time I did bring it up it was brushed off. I don’t wanna be a controlling gf who complains about who my partner is friends with or not but idk. It just bothers me a little and I feel like I don’t have anyone to talk to about this. 

TLDR: gf’s friend has said hateful things about trans people (I’m trans) and my gf is still great friends with him and made excuses for his behavior. I feel kinda uncomfortable because there’s always gonna be the thought in the back of my head that he doesn't like me or sees me as weird as I know they’ve said bad things about trans people.

Edit: if you have any advice on what I should do that’d be appreciated as well, or if I shouldn’t do anything. I’m not sure if trying to talk to my gf about it anymore would really help the situation. I just feel a little uncomfortable with this person lol