That doesn't mean that one can opt out of being a subject. Of course, you can honorably choose to be a subject in exile, or whatever.
There are Christians who are happy with the Pope. There are those who are not happy with any Pope. The Pope cannot tell you you are not a Christian. And vice versa.
In any family with a lot of children, there are always children who are not talking to, never mind obeying, father or mother. Doesn't mean they are not family.
The above is where this present, very radical Pope may be trying to come from. Meet him in Heaven.
Ah yes, the “once you’re in, you can never leave” argument.
Interestingly, it’s the same position the Mob takes.
Good thing I don’t believe it represents God’s will.
I won’t get in to what I think it actually represents.