You know.. For quite a while now I've been saying that Protestants are heretics which is all good and true, but never did it ever occur to me that because Protestants are heretics, they are not Christian at all.
As we all know, Protestants are deemed to be schismatics and heretics by the most Holy Roman Church. At the same time, we still have some people referring to them as Christians, when St. Robert Bellarmine describes why this is impossible:
"A manifest heretic is not a Christian, as is clearly taught by St. Cyprian, St. Athanasius, St. Augustine, St. Jerome and others."
By this very statement we can conclude that Protestants are not Christian and should not be referred to as such. It doesn't matter what Benedict XVI or any of the other post-Conciliar popes say Protestants and the schismatic "Orthodox" are not Christian.
I'm sure that this is not a big revelation to most people here, but I never realized that I was calling Protestants Christian this whole time. I just thought I'd share for all others who may not realize that they are calling Protestants that which they are not.