way to eliminate prejudice
Oh for pete's sake, I hope that tweet was ironic.
No, scaring people into not saying things out loud doesn't make them stop thinking it or believing it. It just makes them really, really pissed off and gives them reasons to believe they're right, and that you're an oppressive nut job so things you're saying are obviously oppressive nutjobbery, and sooner or later that's going to burst out, isn't it?
This comes from a basic political movement that believes it can create a believed narrative just by controlling what people are allowed to say and banning the nasty bits of facts and reality from being spoken. It's developmentally the same level as learning that putting your hands over your eyes doesn't mean people can't see you, this is toddler level thinking.
It's also absolutely lacking fundamental ability to respect others, (uses that language happily but no grip on what it means unless it's self serving), lacks basic comprehension of theory of mind and without basic emotional intelligence and social understanding of how people work.
What does a captive populace usually do when really pissed off? Take a look at the history books. It never goes anywhere with sunshine, rainbows and happy ever after. Which is why so many of the basement computer warriors are proud political anarchists when you check their bios and affiliations.