My point is not that people don't ostracize heretics, it's that "heretics" aren't a real category that people identify explicitly. Heresy is not a thing, people don't think "you were a heretic" as the reason they're ostracizing you (look, maybe 12th century peasants did, that's beside my point, we're talking about modern politics). People who want to ban these things don't think of this as "banning heresy", they think of it as "banning a bunch of terrible things to benefit society". If you're just going to dismiss these people's perspective as banning "heresy", you're just talking past them. You're not earnestly engaging them in argument.