“To be deep in history is to cease to be Protestant”
-John Henry Cardinal NewmanSomehow I doubt that.
Historically speaking, the Church has always been pretty Catholic, and the Protestant Reformation was revisionist, not based on any solid historical grounds. Sola scriptura is an entirely Protestant invention, for instance, and has no basis in either history or Scripture. There is no historical justification for much Protestant doctrine.
Question: do you believe Protestants can go to heaven?
Of course. Unless they commit a mortal sin and die without repentance. Just like Catholics.