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Well, if I had the time, I could have included many other Protestant founders on the thread, but this is just a representative sample of all the Protestant denominations that exist.
People may not study the founder's teachings of their denomination, but their denomination surely does, and that is what they teach (until they change the founder's teachings), so the members learn those teachings from their denomination's teachings in church.
I would argue that Charles Wesley preached (very eloquantly) through his hymns (some of which we sing in the Catholic Church), and Henry VIII preached through his immoral actions, and through his "founding a denomination" by severing all ties with the Catholic Church. Those deeds follow them in their denomination's adherents.
And while I understand the distinction you are making for the "cults", there are multiple valid definitions today for the term "Protestant", and the one I utilized in this thread was the one that defines the term as "non-Catholic / non-Orthodox" "Christians" or those who identify themselves in some way as being "Followers of Christ". (Do a Google search on definition of protestant, and you will find that definition as being one of the valid ones sometimes used today.)
Did MILLIONS attend your EVIL POPES 'preachings' and masses?
I guess that TEACHING still runs thru YOUR chosen religion today; eh?
“I would argue that Charles Wesley preached (very eloquantly) through his hymns (some of which we sing in the Catholic Church)...”
Uh oh, by your own logic, that makes the Catholics followers of Wesley, and you have therefore indicted your own church with your original post.