Protestants, why do you still say that Peter was not the Rock that Christ built his Church upon?

Because for all their "We're bible-based and you're not" rhetoric, they pick and choose which parts of the bible they believe and dismiss the rest. It's all about the Protestant agenda. That's why their people removed books from the bible and added to the Ten Commandments. They don't want to admit that Jesus founded the Catholic Church; that the Catholic Church has a direct connection with the apostles or even that the Catholic Church put scripture into book form called the Bible.