I'm conservative(ish) in a fiscal sense, but don't read conservative news (because it sucks), don't search for conservative topics (nor really any political topics), and am not interested in any alt-right or political conflict type videos. Yet a smattering of this kind of thing often winds up in sidebar suggestions.
I can't help but feel it's a bit of a fishing expedition to determine political alignment. Probably paranoid though and it's more like conflict gets eyeballs to serve ads to. Which is a statement on human nature more than Google. Who knows, but it is annoying.