Don't you see how it works? If Paul was that bad then xtianity would never have spread as it did. Xtianity did spread as it did (obviously), therefore Paul couldn't have been that bad. The logic is as watertight as any circle can be.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'