I've heard over on the Creation vs Evolution thread that a lot of non-Christians equate the bible story or the God of the bible to the same as stories/myths about Thor, Gilgamesh or Zues, etc.
Yet I have not ever seen a society of churches dedicated to any of these Gods. On the other hand we have multiple churches dedicated to the God of the King James Bible. All the way from Israel (God of the OT) to the United States. As well as other countries.
The bible is in most hotel drawers. I don't see any religious books about any of those other Gods as a worldwide staple.
Keep in mind that the Bible is a collection of numerous books by numerous different authors from different time periods. I don't think the God of the bible can be compared to ancient myths at all.
Ever hear of Lord Raglan's The Hero? In short, its a study of common characteristics of various hero myths. Raglan decided that many of the hero myths he'd studied shared common characteristics. These characteristics have to be somewhat loosely interpreted or they wouldn't fit anyone, but are as follows....
1. Heros mother is a royal virgin; 2. His father is a king, and 3. Often a near relative of his mother, but 4. The circumstances of his conception are unusual, and 5. He is also reputed to be the son of a god. 6. At birth an attempt is made, usually by his father or his maternal grandfather to kill him, but 7. He is spirited away, and 8. Reared by foster-parents in a far country. 9. We are told nothing of his childhood, but 10. On reaching manhood he returns or goes to his future Kingdom. 11. After a victory over the king and/or a giant, dragon, or wild beast, 12. He marries a princess, often the daughter of his predecessor and 13. And becomes king. 14. For a time he reigns uneventfully and 15. Prescribes laws, but 16. Later he loses favor with the gods and/or his subjects, and 17. Is driven from the throne and city, after which 18. He meets with a mysterious death, 19. Often at the top of a hill, 20. His children, if any do not succeed him. 21. His body is not buried, but nevertheless 22. He has one or more holy sepulchres.
Different myths score differently, of course. For example, Oedipus scores a 21, Zues scores a 15, King Arthur a 19 and so on. Real people, that is people who actually existed, rarely score over a 7-8. Lord Raglan never scored Jesus on this scale, but depending on which scholar does the scoring, he usually falls in at 18-20.
Now many people would probably say, "So what? This doesn't prove anything." and they would be right. However, it does strongly suggest that Jesus was a myth...or at the very least his life's story was. Perhaps those who created this story borrowed popular mythological elements that they already knew. Either way, comparing Jesus's story to myth is hardly anything new or in any way invalid. Quite the opposite, the "Jesus as myth" view is one that seems to be gaining strength ever since they stopped killing people for having it.
I'd like to add that your OP is basically just a couple of logical fallacies.