Does God / a supreme being exist?

[Noselacri]

I am equally weary of religious people who eagerly make themselves look victimized whenever their faith is opposed. You'll notice that I did not insult religious people, I only question the validity of any proof to the existence of any god. I do not equate belief in God to belief in Santa Claus, but I equate alleged sightings of divine manifestation to reported sightings of UFOs and the like: usually wildly unbelievable and literally never confirmed.

Virtually every defining aspect of Christianity is appropriated wholesale from other religions that far predate it. This is the main reason why I find it difficult to believe.