There is a movie on netflix about Epstein the island.
This is a news story about a series of events. It is not the same as a political ideology.
Someone thinking girls were locked in the basement and deciding to storm the place is a sign of a mental health issue. But his actions doesn't make the known facts false.
I agree with all of your other points.
The US standards for defamation are explained very well here https://law.stackexchange.com/a/132/11158
Folks with this "naive" political ideology are shooting at people and kicking peoples head on the streets. Many innocent have died in the riots, much more have lost their business to looting.
I don't see conservatives having a hard time condemning the pizza place shooter or any other similar act, but I see a lot of leftists rationalism and even denying altogether the bad actions of their bad people. They even cheer their bad actors on.
If I were to go into work saying I supported Trump, I risk getting fired, because of rhetoric like this.
I don't know if they do this for ideological reasons, or if the outrage machine makes them a lot of money. My guess would be the latter.
But some random guy saying something silly and offensive in one (live?) interview is still not the same as a set of very specific completely baseless allegations in the right-wing conspiracies theories.
At this point I can only assume ill intent, since we are bombarded daily with rhetoric likening any action by the POTUS and his admin to something nazist.
From a very quick search it seems that the police didn't take several cases serious, and were at the very least rather lax in their attitude. In other words, there's at least an actual crime and at least some smoke. It's not something invented from nothing.
And this is the real danger of this sort of politicized conspiracy bullshit: now this is automatically seen as "politically motivated" instead of actually looking at the matter at hand. People who spread pizzagate-esque conspiracy theories or enable them are very much harming the anti-paedophilia efforts.