No, more like, if I go to a race track (private property/public accommodation) and people start booing - or cheering for Brandon. First Amendment.
It’s not First Amendment. It’s just a pain in the a@@ to remove a few thousand chanters, so they let it stand. If they had a few thousand bully boys and enough paddy wagons, they’d be in their rights to remove the chanters, if they wanted to. But they didn’t. So they didn’t.