When I was a conservative piece of shit, in my younger days, I had the most outlandish bumper stickers you can imagine. Probably more outlandish than you can imagine, actually, 99.9% likelihood. There were quite a few. I knew I was being an ass and I loved when it offended people, because I was miserable. Someone was paying attention to me. I was getting a reaction. I existed! Anyway, yeah, it can be as simple as "they get off on ruining your day cuz they're miserable pieces of shit." Speaking from experience.