I believe 20% to be way too high. Sure, there are a lot of people who are entrenched into defending 'their side,' just look at the people who still think the Covington boys were aggressors or are still defending Smollett, but I think once the crimes against humanity and against children start becoming public a lot of folks will have a sudden change of heart and quietly pretend they always knew something was fishy. That's about what happened when Snowden did his thing, at least. In the public consciousness the idea of mass government surveillance very quietly went from being a 'conspiracy theory' to 'of course they've been spying on us the whole time.' How much of that change was a result of push by the DS and Clowns to frame the narrative that way and how much was just natural human reaction to major change is hard to say, though.
Most people don't like being on the losing side, so when they end up being wrong about something really big they'll naturally try to gaslight the people they regularly interact with into thinking they always knew to some extent so they end up being on the winning side. Maybe some really do 'know' in that it's on the fringes of their awareness (either because of conspiracy memes that gain traction such as AJ's 'turning the frogs gay' bit, or a conspiracy-esque mention in a popular television show or video game) but they subconsciously dismiss the notions as absurd because of peer pressure to conform to the narrative. Hopefully the evidence that comes out will be shocking enough to snap even the deep-sleepers out of their trance. Q's mentioned in the past at least one Hillary vid that's 5:5 undeniable, so maybe the big guns really will come out when the time's right.