A false dichotomy is when you reduce a situation to two possiblities--the thing you want, and the "opposite" of that thing, usually something socially unacceptable.

The "hiding" I'm referring to means people keep socially unacceptable viewpoints to themselves because the media has convinced them very few people agree with them, and everyone else will be against them for having these viewpoints. It's like how we were assured everyone wanted more COVID lockdowns, but everything was jam packed with people when it got too painful--even people insisting lock downs were correct would do this while trying to convince everyone they agreed with them, like the media insisted was true.