First of all you don't become a conservative Christian by being willing to read. So lets imagine DeSantis misspoke and said "The only way to ensure that Trump can violate The Constitution and overthrow our democracy is to read the New Testament and understand it"

Here are some probable outcomes:

They see that Jesus is a leftist and can no longer call themselves Christian, when asked their religion they say "none, atheiest".
They see that Jesus is a leftist and conclude that the bible was simply written by leftists and that it isn't true.
They see that Jesus has good ideas, unconsciously redefine what conservative means to them, and stay quiet until someone they considerd a friend angrily calles them a libtard for stating one of jesuses teachings in disagreement of something thet had repeated from facebook.
They see that Jesus is a leftist, they trust in their lord choosing his love and reason over the hatred and fear of man and can no longer call themselves a conservative.
They conclude that Pontius Pilate and the Roman government where the good guys and Jesus was an evil libtard who earned his crusofiction and they start worshoping Pilate instead.
The whole thing goes over the readers head
They strengthen their belief by ignoring parts that clearly don't fit their belief, and twisting anything that can kind of fit their beliefs.