That is largely a Calvinist claim. As you statement is written, it simply isn't true. The majority of Protestants are not Calvinists.
I was not aware of that. I have talked with many different Protestants, and they all seem to believe "once saved -always saved" theology. On this thread, the gentleman is a Baptist, not of the Reformed side. (I don't know if Baptists fit on either side of classical Protestantism). Could you please explain a bit your beliefs on this subject so that I am able to better qualify my statements on this subject in the future.
Thanks and sorry for my generalizations on your own beliefs.
Regards