Who decides?
God decides
not you not the Roman Catholic Church, not the Calvinist church, not the Lutheran church, not the (inset any name church you can think of)
the church of isreal, was instituted by God, he set up the priesthood, ordained it, and proclaimed it an eternal institution as gods representatives on earth
those who followed that church in Jesus day are in hell today because they followed tradition and history and men
If you wish to risk doing what they did feel free
one thing is for sure, I can have no unity with you, no one can who is not catholic, because in your view. Your right and everyone else is wrong unless they agree with you
again, I. The case presented in this thread, I rest my case concerning certain people in their own denominational churches (and yes, catholicism is a denomination, whether you agree or not does not really matter,