Wow. Y'all are sure quick enough to disown Catholics y'all disagree with, until it comes time for a head count.
Whatever happened to *once a Catholic, always a Catholic*?
All Christians, baptized in the name of the Father, Son and Holy Spirit are members of the Body of Christ, which is the Church, as we are told by Paul in Colossians.
One’s baptism cannot be undone.
As for Catholics who are actually Protestants, there is a misconception by them and many Protestants, that just because one attends Mass and receives the Eucharist, one is Catholic.
But, that is wrong.
One receives because one is Catholic. As Justin Martyr said in his letter to Caesar circa 150AD,
And this food is called among us Eukaristia [the Eucharist], of which no one is allowed to partake but the man who believes that the things which we teach are true, and who has been washed with the washing that is for the remission of sins, and unto regeneration, and who is so living as Christ has enjoined.
He is telling us here that the Eucharist is for those who believe what “we” teach are true. If one is receiving the Eucharist, then they are not Catholic in there beliefs and lives, they are in fact, Protestant and should not be receiving the Eucharist.