In your opinion what causes christians to believe in Jesus

[Sheldon]

I mean, you're personifying the fig tree story to push it to absurdity. The story isn’t about trees trusting God—it’s about people bearing fruit when they appear outwardly religious. I don't see why that should be a contentious lesson. If anything it shows it's not enough the believe in Christianity, faith actually has to do something productive.

Did it actually happen or was it just a parable? If it actually happened, was it just to illustrate the point? Because it kind of undermines the point, IMHO, to curse the fig tree for not bearing fruit when it wasn't supposed to.

The canonical gospel myths are all anonymous, and the earliest of them dates to decades after the events it purports to describe, even by the methods of historical validation this sort of anonymous (second-hand at best) hearsay, represents the poorest of evidence, and for the most extraordinary of claims, and all from an epoch of extreme credulity, ignorance, and superstition. 

I am not sure on what basis one would disbelieve claims, if one set a bar this low for personal credulity, without simply indulging wishful thinking and incredibly closed minded bias.