To many times.
He has been shut down at every turn and is now getting to that desperate point since no one lets him proselytize his ilk.
No I have not.
That is the key.
Keep reading.
There is almost nothing certain in this field with the DH. We now it happened to the point of factual. But the details get murky at best and there is a wealth of good credible opinions that can help you decide how you want to process the information.
DH = documentary hypothesis
Basically we have multiple collections of northern and southern polytheistic traditions that went through multiple redactions within the monotheistic reforms of the multiple cultures that made up these peoples.
The best reading is over 100 years old, its a classic, but the work so well done, it still serves as a foundation for anyone researching this particular topic.
http://www.sacred-texts.com/bib/log/index.htm
I keep it in my favorites