Consider the following hypothesis:

The ‘apostle’ Paul was not a Christian convert in the sense that he believed in Jesus as the Christ. Rather, he was an persecutor-turned-infiltrator who knowingly and intentionally subverted the Christian spiritualistic cult of tongues, miracles, healing, and apocalypses into a pseudo-Platonic philosophy more palatable to his cosmopolitan sensibilities and less offensive to his Jewish heritage.

What evidence from the resources we have (archaeology and the texts) would convince you that this is possible, or even probable? Is there any evidence that could convince you?

What evidence could vacate this theory or even just render it unlikely?