Apologies in advance for the length.
My Uncle and I don't see eye to eye on politics. I'm fairly moderate while he swings to the absolute extreme on one side. He recently posted on facebook a quote by a politician. I hadn't heard the quote and it seemed kind of off so I decided to google it. Turns out what he posted was just a tiny part of the overall statement, which when read in its entirety means something completely different than what the single quote implies, so I posted a link to the full statement with my own opinion that I thought the quote was taken out of context. Let me say that this wasn't out of line for my family, we all have our various opinions about a lot of things and frequently have minor debates regarding each others postings. He's definitely never been shy about letting me know his opinion on things I post.
He didn't really respond to my reply but one of his friends (who I do not know) did and we were having a nice conversation about the quote (we didn't agree but it was friendly). Then this other person (also unknown to me) jumped in and said something extremely offensive. I was honestly so upset by what this person said that my heart was racing and I felt sick to my stomach. I know that sounds like a dramatic overreaction but what happened is that I felt horrible that I'd inadvertently created the opening for this comment to be made (by starting the discussion), and I was afraid one of my friends would follow me back to the conversation (Uncle's page isn't private) and see this statement, so I just deleted all of my comments (2 or 3). Now if you look at the thread it doesn't really make sense. If it matters, he "liked" the nasty comment so I know where he stands on that.
I'm wondering if I should apologize to my Uncle for making a mess of his status? I don't want him to think I'm okay with what was said and I don't know how to apologize while making it clear I found the comment completely disgusting, that would come off as a non-apology. He hasn't contacted me about it at all and I think he would if he was upset, so I'm 99% sure he doesn't care. I'm still upset by the whole thing and unable to remove my emotions and see this objectively. Do you all think I owe him an apology and, if so, how do I word it?
(I can't unfriend or block him without causing collateral damage for some of our mutual relatives but I did unsubscribe from his posts.)