In your opinion what causes christians to believe in Jesus

[Angrboda]

And Christian faith, broadly speaking, is concerned with specific outcomes such as salvation, forgiveness, eternal life, and the like. And so, when a Christian lives by faith, they're saying they trust God with their salvation essentially. 

That's trust in the absence of any demonstration that one's fidelity is warranted, which is to say blind faith.

But I agree with Rhythm. You're someone who says a lot of stupid shit. Something that hasn't been fulfilled doesn't qualify as a fulfillment of one's expectations.