In many 'primitive' cultures, the evil
gods are worshipped, because ONLY the evil gods DEMAND it. If they don't worship the evil gods, plagues, droughts, crop failures, etc. will happen. Terrible misfortunes!
The good gods are above such petty bullshit. They're, you know, GOOD.
Just like certain Christians claim America isn't full of holy enough rollers, so that's why there are disasters and attacks, and it has nothing to do at all with the horrific things we do, and terrible regimes we support for petroleum, so drive your SUV in peace.
Of course, in their conversion to Christianity, it is imaginable that for many native people, in the Christians (especially conquistadors) they discovered a much darker, eviler god than any they ever had to worship before, so got right down to worshiping it.
Not that I believe any such crap, but we could posit that there is a 'good' God/Jesus that actually died on the cross, washed away everyone's 'sin' with his sacrifice (however that worked), and everyone is 'saved', no matter what. Yay good god!
There is also the dark, EVIL, vain, vindictive 'God/Jesus' that demands absolute, unquestioning fealty, constant worship, bloody crusades against heretics, etc., or he will smite the nation with destruction and plagues, and cast everyone into hell, etc., etc., etc.
And there are all kinds of Jesuses and gods in between.
Though in the Bible, satan basically did whatever his god told him to, throughout the OT. He acted under god's orders, doing QA on the faithful, testing them even to destruction, etc. There isn't any way an 'omniscient' god wouldn't know what one of his minions was up to. We see this in the book of job, in eden, in jesus' temptation, throughout the bible. Satan does god's dirty jobs, working FOR god the whole time, and is ultimately made into a villain in the new testament, predicted to be made a fall guy for all of his loyal work, as was the angel of death, and 'hades', which is odd, since hades seems both a place and a person interchangeably, according to the passage, and separate from 'hell', though a place of torment, according to Luke 16.
Naturally, different flavors of Christians describe hades differently, and different translations change it around, too.http://en.wikipedia.org/wiki/Hades_in_Christianity
Satan in the bible...http://www.biblegateway.com/quicksearch/?quicksearch=Satan&qs_version=NIV
Hades in the bible...http://www.biblegateway.com/quicksearch/?quicksearch=hades&qs_version=NIV