<human>: Summarize the given text in a few sentences.

I've been dating my girlfriend who is black/African American for like over 3 years. (I'm white) Our relationship is pretty good but she's recently changed in a way and I don't know if I'm completely comfortable with it. 

She has recently gotten really into African American rights/black issues which she wasn't really that into before. Like before she was just a person who happened to be black but now she's gotten really into this actvist club on campus for black people I guess and she is taking courses in African American studies and recently a lot of her posts on facebook and twitter are related to stuff like racism, black poverty, police brutality, etc. 

I don't really know where all this came from and I agree with her that there are issues with racism in the country but it's starting to make me uncomfortable. She'll randomly bring up stuff like white supremacy or  "systemic oppression"  in conversations sometimes or at times I'll say something and she'll say how what I'm saying is problematic or racist and explain why. I'm a lot more liberal than my parents, who lean more conservative (although they love my gf) and she even started talking about this stuff with them which made them SUPER uncomfortable. 

Recently we got into an argument about Colin Kaepernick and his whole anthem protest. I was saying how although I understand what  he was doing, I don't think disrespecting the country that gives him the freedoms that many other countries wouldn't is the way to go and she completely disagreed and talked about his right to protest and  "how some white people love black people when they shut up and throw a ball for their entertainment as long as they don't say anything" (her words) and other stuff and it became a huge thing but I eventually conceded because I didn't want to piss her off and I just wanted the argument to end. 

My friends all think she's going to break up with me because I'm white. I don't really think so because she hasn't really indicated she's not happy in the relationship but I can't lie that some of this stuff is just making me uncomfortable. 

Any advice on how to deal with this?
<bot>: My girlfriend has really gotten into stuff like racism, african american rights, etc and it's starting to make me uncomfortable.