I think that in order to understand what a Protestant Christian is, you must first understand what it is that he or she is Protesting against in the first place. Which is the traditions and practices not found within Holy Scripture, which the papists would have you believe are absolutely needed to go to Heaven. That is what we protest. You're essentially saying all those Christians (including Catholics) who didn't believe in Papal infallibility go to hell, or the Marian Dogmas which were not around in the earlier years.

If i'm going to hell because I don't believe in these things, we can just blame the Apostles or even God himself for not having them write these things down in Scripture where it would be God-Breathed.