That's not normally the tool that democratic societies use. The US didn't wholesale kill its segregationists in the 60s. Western Europe didn't kill its Nazis, or its Stalinists. Ayn Rand wasn't pushed down a stairs. I'm trying to think of an example of where a modern democratic country _did_ do this. We didn't kill the misogynists or the racists or the homophobes, we just let them slowly fade into irrelevance. It's not done yet; it's a process.
Societies who do try to kill off bad or opposing ideologies rarely actually do that well with it. How well did the Soviet Union really do with getting rid of its ethno-nationalists, say?
Edit: I suppose one example would be covert action, there has obviously been some of that. Rounding people up wholesale doesn't really happen, though.
Not sure how that's substantially different from the soviets rounding up the ethno-nationalists?
"We stop killing off / imprisoning people once we give them the right to vote" seems a little too tautological.
The thought of this was just way too satisfying...
Police, as we know them today, were literally created in this period in response to these crowds of lower-to-middle class workers who were disrupting society.
They had to be because the armies that were sent in were ordered to shoot people in these crowds...and you had things like this: https://en.wikipedia.org/wiki/Peterloo_Massacre
This sounds like a conclusion reached through confirmation bias.
Purges? https://en.wikipedia.org/wiki/Purges_of_the_Communist_Party_...
I reach for hyperbole here, because usually the tool that societies reach for to kill ideas is to kill the people that hold them. 99 times out of 100.