so you’d agree then that when protestant folks deviate from doctrine in obvious ways it creates a separate denomination yes?
Of course, but if there is also an accepted standard core of beliefs, which binds us all (Catholics, Protestants, etc) as brothers. We have a saying that goes: “we can agree to disagree”, but leave in peace. We don’t deny others the right to believe what they want, but rather will remove ourselves from sharing in the sacraments, due to differences in doctrine/dogma that will probably never be resolved this side of eternity. We tend to err on the side of caution out of respect for the sanctity of the sacraments themselves.