I don’t know of any Baptists who call themselves Protestants, but I could be wrong.
Well, perhaps I stand corrected. I am not one to defend my opinion or assertions to the bitter end, when not to do so would be having to say “I wasn’t completely right”, “I failed to consider certain facts and arguments”, or even simply “I was wrong”. Happens all the time. To all of us.
My understanding was that Baptists consider themselves heirs to a two-thousand-year history of persecution, martyrdom, simple Christian witness, and a pure Christianity that, in their eyes, Roman Catholicism is not — in other words, “there have always been Christians who were essentially just like us, and who were no more conformed to Roman Catholicism than they were forced to be by an all-powerful church and state — then, in the fullness of time, the Reformation came and we were finally free”. Paulicians, Waldensians, Cathari, Albigensians, Montanists — the list goes on. As I said above, it makes more sense to think of Baptists as Christians who, according to their own history, later became Protestants, or at least were grafted into it. From a Catholic standpoint, this is a sort of revisionist history, but be that as it may, it is a bit too facile to say that “all Christians were either Catholics or Orthodox until the Reformation”.
The Waldensians still exist today and even founded a village (Valdese) in the North Carolina piedmont near Charlotte, which has a fascinating history and is well worth stopping by and spending the afternoon visiting. They later became Presbyterians as they reckoned this the American denomination closest to their beliefs.