I dunno if its much worse, just easier to hide behind online anonymity.
We've been hearing horrific chants about the Munich Air Disaster, Heysal, Hillsborough, the Leeds fans deaths in Turkey long before twitter became a platform, and that's just teams with Manchester United rivalries. In College basketball we've seen people chant PLO at Steve Kerr when he was in college (his dad was killed in a terrorist attack in Beirut in the 80s) and Virginia fans chanted "crackhead parents" at Juan Dixon while he was at Maryland (both his parents died of HIV after struggling with Heroin addiction).