GROOOOOOAN!
Snip:
Adam Gadahn was home-schooled at the family farm in Riverside County. He did not attend college. Omar said the family was a "more or less Christian household, but no one was particularly religious."
Omar said he doesn't know why his brother converted to Islam. But a statement attributed to Adam Gadahn on several Muslim-related Web sites said he "gradually realized I could not be a Christian." He went through an obsessive phase with heavy metal music and eventually turned to Islam.
http://abclocal.go.com/kabc/news/052704_nw_terrorist.html
Does not compute with the description of the father as a halal butcher.