All kinds of behaviors are more just in group signalling than they are motivated by sincere belief, though over time one loses track. You say and do things, big and small, for the approval of your "community" whoever that happens to involve (friends, family, church, your internet weirdo forum, whatever).
Can't fake some behaviors, but you can fake "not getting vaccinated." Tell all your MAGA buddies that you didn't do it, but just go do it!
