You wrote:
“And if you believe the Bible that one Church is all believers. ...”
No, if you believe the Bible then you’ll see that all orthodox believers had one set of beliefs and one Church. Only later - 1500 years later - did Protestants invent the idea of the invisible church or the church of all believers (no matter how much they disagreed with one another on doctrine!) so as to support their own schism.
Funny, orthodox is not even a word in the bible. Jesus never created this so-called category of 'orthodox', which has evolved over the years into a Pharisee-type state.