To me the evidence is in the Roman's decision to assign and tweak specifically Christianity as it's official religion. With their military might they could have imposed something else, right? They could have used a different religion, or even used secularism. Regardless, Jesus of Nazarene was the strongest demand from the people so they chose that idea to make their own and solidify power. Turns out they made the best choice! Their wicked heart still beats in the RCC.
Bart Ehrman did a good article on this on the Huggington Post.
-Sab