Roman Catholics are morally bound to believe whatever the pope teaches
Serpentdove, you have not addressed what Cruciform wrote in post #5 of this thread.
What you claim as a unique fault of Catholicism is simply a necessary characteristic of all organizations - religious or otherwise.
There exist certain features (beliefs, values, etc) which define people as members or nonmembers of a group.
I can't call myself a football fan if I am against football as a sport.
"Liking football" is a
defining characteristic of the group, "football fans."
I can't call myself a vegetarian if I eat meat.
"Not eating meat" is a
defining characteristic of the group, "vegetarians."
I can't call myself a Christian if I do not believe that Jesus rose from the dead.
"Believing in Jesus' resurrection" is a
defining characteristic of the group, "Christians."
Calling myself Catholic means I have certain beliefs. Who
defines the
defining characteristics of Catholicism? The Catholic Church, of course. It would make no sense, otherwise.
But don't pretend you don't have your own defining characteristics. You do.