Yet seems to display all the self centred selfishness of someone very very rightwing. Individualism not society.
He could easily be being brainwashed by online evil that tells him to cut people off if they slight you, once you are isolated IRL you are much easier to further influence, watch the videos, go on notice boards, they just want his attention, they get paid ads.
He thinks he's a bit of a cut above everyone else? Perhaps. Yet he is so unsure about his opinion he creates numerous accounts, so he can log in and "back himself up online". If he was that brilliant one twitter account should suffice.
He is letting SM dictate his, your, your kids, your family and friends lives. He's an idiot. And sounds like he is doubling down so you can't challenge his dumbness you have to excuse it.
Honestly the best way you can help everyone is to be honest. Tell him you aren't going to excuse him or lie.
If he has to keep so much of his life a secret it's probably not a life you should be living.
No need to argue, if he asks "who you been seeing, what you talk about" say you first, what you been tapping who you talking to.
If pressed further say you haven't told anyone anything that isn't true.
If pressed further say you have been engaging with people who make your life better (you can avoid the word happy).
If pressed further you can say saw sister. You can tell him lots you spoke about that isn't him. In fact you can just get to the point of not discussing him with your family. You can also tell him that. Say they know you won't come they have stopped asking now.
Men hate being ignored. So if he knows he is no longer even an interesting passing observation he can stop asking.
At this point you can ask again, your turn, who you been tapping out messages to? Any interesting conversations?
And if he still won't tell you remember and next time he asks you say no no you first, you always expect me to tell you and never tell me so you go first this time.
Repeat etc etc etc
Bore/ignore him into realising you are not going to be controlled or dictated to by his utterly irrational demands.
If he starts shouting let him run out of steam and calmly say OK.