In your opinion what causes christians to believe in Jesus

[Sheldon]

That’s not really how it works. You observe it raining, and then gather evidence by looking at the grass. If you haven’t observed the rain (or gotten EVIDENCE of a recent rainfall), you can reasonably conclude that something other than rain made the grass wet. What your scenario does is test the hypothesis that rain is the only thing that makes grass wet.

 if you observed the rain itself it's pointless to look for evidence. 

If you observe the rain, then that IS evidence. No one here has suggested that all evidence warrants a conclusion, but to assert evidence doesn't exist is beyond asinine. 

This must be a windup...