A lot of things to respond to, by I'll start with this - there is no historical evidence of zeus or thor existing. There is, however, historical documentation of the Abraham, Moses, Jesus and Mohammad existing and actually walking on this earth (along with other people that are alleged to be sent by God and documented in religious scripture). These human beings are not mythology like the Greek gods, they are actually real humans that were on this planet and seen and documented. Once we agree that these people were real people, the next thing to be debated is their message regarding God and whether their message was truthful or false and whether they were actually Prophets. If you believe they were Prophets that came with a true message, then you believe in God. If you believe they were liars or con artists, then you may not believe in their God.