"And I tell you, you are Peter, and on this rock I will build my
church, and the powers of death shall not prevail against it. I
will give you the keys of the kingdom of heaven, and whatever you
bind on earth shall be bound in heaven, and whatever you loose on
earth shall be loosed in heaven." - Mat 16:19
Some Protestants - Peter is not the rock.
Reasons - Petra vs Petros
Context error -
a) The Gospel of Matthew was written in the Koine dialect of Greek,
where there was no distinction between the words petros and petra;
both simply meant "rock". A male given name should be masculine,
whilst, the word for "rock", is feminine (-á).
b) Jesus spoke in Aramaic. There is no distinction for either Peter
or Rock or Stone as its both Kepha. IN John 1:42, Jesus calls
Peter, Cephas.
A better English translation, ignoring the tradition of naming
the saint Peter in English, would be you are Craig, and on this
crag I shall build my church..., relying on English use of the
Gaelic name Craig (meaning rock) instead of using the name
Peter.