It is actually very much like that to be truthful. I have cousins I run into that turn their faces at me. No one will talk to my children either. It is very dysfunctional. Years of therapy has helped.
Wow. Sorry to hear they are bunch of nincompoops.
I guess if they took on the stance "You're either with us, or against us!" then they'll see any
choice you make on your own would be "against" them, which allows them to tell themselves that you betrayed them. That is so incredibly backwards.
But overall it sounds like you are in a much healthier and happier space. Nothing good comes from being overly insular and hostile to change. They are only laying seige to themselves and weakening their own family bonds by denying family members access to healthy relationships
to one another.