>The First Amendment didn’t prevent our genocide of native peoples. Democracy didn’t prevent 100 years of slavery. ‘The marketplace of ideas’ didn’t keep us from torturing people to death or killing a million people in a pointless war.
You don't seem to understand the function of the things you dismiss. The First Amendment, Democracy, and trust in the Marketplace of Ideas exist to make sure that society's mind can be changed as easily as is practically possible. It's not a guarantee that society will get it right, it's an escape hatch for when society gets it wrong.
And when we look at everywhere else, where those escape valves don't exist, you get nothing but mass murder as a direct result of unquestionable, unassailable government/popular policy.
Think of how much more difficult it would be to change society's mind about separate-but-equal or nonstandard sexual orientations if you weren't able to talk about or vote on them in the first place; you'd never have the kind of cultural revolution you had in America in the 1950s-70s without the ability to first persuade people it should happen.
>Decorum and the delicate feelings of bigots do not matter.
Despite what you may want to believe, you are not the one who decides who is and is not a bigot.
Expose your life to the logical consequence of that; I don't think you're going to like what that statement fully implies.