lots of luck with that theory....there is one true Christian religion and it is Catholicism. If you claim to be a Christian, but choose not to follow the Catholic church, you are a protestant. Some of the early followers who wandered off into various heresies are actually neither Catholic, Christian, nor protestant.
as to "truth seeking Catholics" who split away during the revolution, they were mislead and drawn away from th true church and weren't seeking truth at all, they were following charismatic people who decided that they could alter and otherwise change the church to suit themselves....tragic!!
So what would you say designates a person as not Christian?
Totally untrue, and has been proven so all over this and on other thread.
A person can become a Christian without having any involvement with Catholicism or Protestantism.