Honestly it doesn't seem to take very long at all. I watched live as the insurrectionists attempt to overturn democracy in the US during their failed auto-coup on January 6th less than 3 years ago.
Though there was some "it's not real" talk in the immediate aftermath the idea that it was a false flag, antifa, not an insurrection, not a big deal, just tourists having an afternoon scroll, etc. seems to be growing.
I wonder why the "left wing radical Democrat antifa operatives engaging in a false flag attack to make Trump look bad" marched under banners with Trump's name, admitted they were doing it for Trump, in some cases ran for office on the Republican ticket, and are actively being protected by Republican politicians.