I've had issues with several of my coworkers treating me differently. They are often cold to me, ignore questions that I ask at meetings, are unusually critical of my works, etc. It's always bothered me, but I never knew why they didn't like me.
About 2 weeks ago, another coworker (who is nice to me) told me in confidence that he thinks they don't like me because of the color of my skin. I do have a different skin color, but I thought he probably was overthinking things.
Yesterday, a separate coworker told me that he overheard these same coworkers talking about me. He concluded "they hate you because they're liberal, and they think they're superior because of your skin color".
Now I'm very apolitical (I know nothing about politics and don't consider myself liberal or conservative). This latest coworker may be a "conservative" who is trying to pick a fight with a group of "liberals", and I certainly want no part of it. But the fact that this is the 2nd person who has recently told me that they don't like the color of my skin has me concerned. He might be right.
Is this something that I should bring up to my boss or to HR? I don't know for sure what they're motives are and I don't want to cause trouble, but I'm really tired of being treated so poorly.