That's so far off the mark as to be ludicrous.
There are not *thousands* of Protestant denominations to begin with. that has been debunked so many times that it's not funny, but I guess that never stopped anyone from buying the party line.
The other thing is, true believers in Christ do not identify with denominations because their identity is IN CHRIST, not in the church they attend on Sunday morning for worship, who whom they choose to affiliate with.
denominations don't save and if someone thinks they do, they're not saved because they're not trusting Christ.
I don't think the church I attend has it all right and everyone else is wrong and I doubt that there's a Protestant here that does. We left our Catholic upbringing behind us with the us vs them mentality.
And I don't think that every other denomination is wrong either. There are plenty of Protestant churches I could attend because I agree with their doctrinal positions on the critical areas, but instead of church hopping every Sunday, we picked one to attend, but that does not mean that by default, we think all the others are wrong.
The issue is, however, that the different denominations do teach different things. If they didn't have different doctrines there would not be divisions. These divisions have existed since Calvin, Zwingli, and Luther first disagreed in the sixteenth century, and it's continued since then. And they can't all be right.
Honestly, I'm just making the same point over and over. Let God sort out the sheep from the goats. We don't need to do the judging for Him. I'm begging everyone to stop hatin' on those Christians who believe differently, if they love and serve Christ as Saviour. You cannot know how God will judge others! But this bickering is madness. It's truly of Satan. You and other Protestants are devoting so very much energy to attacking Catholics who are your brothers and sisters in Christ; would it not please and honor God more to redirect that energy to peace among ourselves and strength against the Devil?
I write this as a lifelong Protestant, now a joyful Catholic. To quote the founder, Hier stehe ich. Ich kann nicht oder.
Good night, and may God richly bless your life.