> FB only works when you and 99% of your social group are on there.

You can choose whatever social group you want on social media. The days of physical presence and limited supply of peers are over.

Your IRL friends don't believe that the government is made up of lizard people? Go find yourself a Facebook, Telegram, Discord, etc. group, you will find plenty of like-minded people and "proof" there. People can and do survive on online contacts alone, so being shunned is not a problem for them. At least not in the medium term.