I do not recall saying all of that. The question is not whether we are brothers and sisters in Christ. We all agree to that. The question is whether Scripture teaches that God gave some men authority over others, and whether Scripture teaches that the Holy Spirit guides each individual Christian into the truth, apart from that authority.
Catholics adhere to the defined dogmas of the Magisterium. "Catholics" who obstinately deny defined dogmas of the Catholic Church are automatically excommunicated under Canon Law Section 1364. They are not Catholic by the definition of the Church, regardless of what they may choose to call themselves.
You can easily walk down the street and find two Protestant churches next door to each other, where one pastor teaches the necessity of baptism for salvation, and the other teaches that baptism is unnecessary. If a Catholic priest obstinately teaches that baptism is not necessary for salvation, a doctrine contrary to the defined dogmas of the Magisterium, in due course he will be laicized.