As Darwin himself put it, science explains how the universe works, not why. If you want to find God (i.e. a higher power of your own understanding), baremission, do not look to mathematics or chemistry or biology, but to philosophy: why are you born? What is the meaning of life? That sort of thing.
As for existence of Jesus, there are Roman and Jewish records, and the Bible itself contains viable evidence. You might as well say there is little evidence that Julius Ceasar ever existed.
And no, you haven't offended me.