If you don't censor bigotry, it just grows even more. No, we aren't censoring it hard enough.
I sometimes think that those who shout the loudest for tolerance are the most intolerant. The problem lies in the distinction between 'tolerance' and 'acceptance,' terms which are erroneously conflated. The process of tolerating something culminates in acceptance of that thing, and ergo anything which is tolerated must be acceptable.
But the terms aren't synonyms. Acceptance requires harmonising something with your personal beliefs. But tolerance is measured in your ability to co-exist with multiple contradictory ideas without attempting control.
If something is accepted, it is because you find it in some way agreeable. If something is tolerated, it is because you are capable of hearing (but not necessarily agreeing with) multiple opinions.
I'm saying this because it's often the 'tolerant' people who argue for censorship of loosely-defined bigotry. But what they really want is to accept things, not tolerate them.
Which isn't to say that some things shouldn't be censored. To name obvious examples - age-appropriate content, incitement to murder/arson/theft, so on. But it
is to say that censorship, regardless of whether it's directed towards what many consider bigotry or outright untruth, is not tolerance. And that therefore we should apply censorship with the lightest possible hand, not the heaviest.