In your opinion what causes christians to believe in Jesus

[Sheldon]

No doubt Christians have a lot of unlikely expectations about the world, based on their worldview.  However, they depend on social proof (other people agreeing with and supporting them) rather than evidence to support their beliefs.  This is unfortunate for them because it cuts them off from so many other people who actually require evidence, as well as from other religious believers with other stories.

In contrast, multiple lines of evidence accumulated over centuries support a materialistic interpretation of the world.  While science is open-ended, it has already discarded a wide variety of interpretations in favor of its own perspectives.  If you want to change that picture, you have to offer evidence supporting Christian assumptions, and not just more stories of how something might be true.

 I would personally erase the word evidence from my vocabulary entirely.

evidence
noun
1. the available body of facts or information indicating whether a belief or proposition is true or valid.

I can see how that would be helpful, for you to cling to a belief for which there is no objective evidence. 

evidence is not self-validating—it gains meaning through interpretation, 

Nope, science certainly doesn't work this way. If someone introduced such subjective bias into their results, it would definitely be exposed, and their reputation would soon suffer, perhaps irreparably. 

interpretation always relies on a framework of prior beliefs.

Indeed, and how reliable those are depends on the amount of objective evidence that supports them. the best method we have for understanding reality is science, by a massive margin, this is demonstrated manifestly in the results. 

Evidence = Observation + Interpretation

No it doesn't, you really need to start giving the dictionary a cursory read before making these absurd claims. 

This principle applies universally, to Christians, to you, to scientists. 

Nonsense, it applies to Christians, as that is a subjective religious belief, but it certainly does not apply to science, the method is designed to remove as much subjective interpretation in its results as possible. 

I would personally erase the word evidence from my vocabulary entirely.

Perhaps it would make more sense, for you to learn what it means first.

The brain doesn't care about representing the truth of reality,

If our brains interpretation didn't ever match reality, we'd have died out long ago. Throw yourself off a cliff, if your brain doesn't care about the truth of reality, it should be child's play.