To claim that Peter is the rock on which the church is built is wrong. If the Roman Catholic church teachers that Peter is the rock, they're teaching something in contradiction to what Peter said, IWO, a lie.
1 Peter 2: 1 So put away all malice and all deceit and hypocrisy and envy and all slander. 2 Like newborn infants, long for the pure spiritual milk, that by it you may grow up into salvation— 3if indeed you have tasted that the Lord is good.
4As you come to him, a living stone rejected by men but in the sight of God chosen and precious, 5 you yourselves like living stones are being built up as a spiritual house, to be a holy priesthood, to offer spiritual sacrifices acceptable to God through Jesus Christ. 6For it stands in Scripture:
"Behold, I am laying in Zion a stone, a cornerstone chosen and precious, and whoever believes in him will not be put to shame."
7So the honor is for you who believe, but for those who do not believe,
"The stone that the builders rejected has become the cornerstone,"
8and
"A stone of stumbling, and a rock of offense."
They stumble because they disobey the word, as they were destined to do.
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Amen!
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These are words of Christ you have an argument with.