“Birds aren’t real” is fully and completely a meme for goofs.

Zuck I think is also just for goofs but the others yes indeed have true believers.

Our politicians and leaders being lizard people absolutely has true believers. Zuckerberg specifically might've taken off as a meme amongst tech critical folk but the core idea comes from genuine conspiracies. Birds are real, I admit, is totally a joke but it flows so well in my comment