I often think anyone who appears to have some major issue with a topic or entity has some issues of some sort. They keep bringing it up, often out of context, and go on and on about it. We've all been around such folks, usually while trying to avoid their company after a bit. uncles and whatnot who can't leave it alone.
They might go on and on about how they hate, say, Halloween. OK, got it, maybe the rest of us enjoy it a bit and are tired of hearing your rants. I understand the folks on FB who go on and on about Trump, I get that, they need to blow off steam and somehow posting in SM does that for them, carry on. Today, all my Marine friends on FB are going wonky about some birthday, something is 249 years old.