In your opinion what causes christians to believe in Jesus

[Alan V]

Not really.  We have free will even if we only have two bad choices.  Freedom only extends our possible uses for our abilities to assess and choose.

Every restaurant menu, with its limits, would negate our ability to choose by your argument.

Actually, yeah, that's a good boundary to set.  If all of our choices are actually more like a menu..where the options are constrained...and then within each of those possible choices we're strongly predisposed towards one or against another...the freedom of our will quickly becomes a term of art.  Consider a menu made almost entirely of things you hate, with one item you enjoy.  Did you freely choose that one thing, or were you compelled?

Well yes, if you could still get up and leave the restaurant.

Another way of looking at this problem is that our body has certain needs we are determined to fulfill, but that our brains allow us to choose between multiple means to those ends, depending on how we assess our circumstances and the possibilities they present. That was the way William James framed the problem of free will at the beginning of Principles of Psychology. After all, consciousness was evolved to serve the needs of its body, and what better way than by giving it flexibility?

John wrote something quite similar above, at #1121.