If I remember my OT correctly, the real name of the being that is being called "Satan" is Lucifer and an angel of God, coming and going just like Michael, Gabriel and the other angels. The Christian Religion in the US has changed significantly since the youth of my generation (the 1950's, 1960's and 1970's) and become somewhat more simplistic regarding good and evil. 

I was brought up in the Bible Belt Evangecal church to believe in God the OMNI - omnipotent (unlimited power), omnipresent (present in all places at all times) and omniscient (knowing all things). 19th and 20th Century Humanist theology really denies Omnipotency and brings forth the problem of Theodicy. I agree with Mr. Henson's description of modern lay thinking of Satan. It is convenient to blame someone else. I think it was Red Foxx who said on his TV comedy "the devil make me do it!" 'Nuff said.