They're genuinely scared they will end up on some list, and Trump or others will take their revenge. Because it's been done so much on the left, the return volley is now scary to them.
Since they truly believe Trump is Hitler, they're expecting camps. So, they are deliberately keeping their mouths shut until "freedom reigns".
The others are trying to conspiracy theory the idea it was fake, or act like it never happened.
Sounds like tomayto/tomahto to me. Some quiet voice inside them wonders if maybe they deserve what they mete out, and it scares them.
I don't know that they've never been told "no", I think it's that they've always been told that being told "no" was an attack.