You can't. There aren't any. It always blows back. America is just failing to learn from a lesson that's been taught to various empires for millennia.
It worked majority of the time. It typically stopped to work only when power to be ceased to have power.
Both nazism and communism were extremely successful in this. The monarchies did this successfully for very very long time. It ceased to work only when their lost power for unrelated reasons. Saudi Arabia is going strong.
The suppression of nazi ideology post WWII did not lead to blow back either.
Which is to say it has never worked. Because all power structures eventually collapse and yet the ideologies they tried to suppress remain and rise again. And sometimes, it's actually the resurgence of those suppressed ideologies that destroys the established power structures. As is the case in the USA right now.
> The suppression of nazi ideology post WWII did not lead to blow back either.
You can't be serious.
https://www.ft.com/content/dcd4aee8-936f-11e9-aea1-2b1d33ac3...
That being said, Nazi Germany did not lost because of internally suppressed people raising, they lost because foreign forces won on battle field. They were quite successful in keeping control.
> You can't be serious.
I am serious. There is nothing to suggest that contemporary German issues have anything to do with post WWII suppression of Nazism. They don't.
I don't really want to have this sort of heated debate this evening. Sorry.