ICANT writes:
God created the devil and his angels who were evil.
They were created for a specific purpose.
That purpose was to provide man with a choice.
The creation of Satan was not necessary to provide man with a choice between good and evil. As John 10:10 has already pointed out, murder and other evil acts exist without intervention from Satan or his nasty little angels. Free will alone is enough of an excuse for man to do bad things, no devil required. So yes, without Satan there still is evil. It's not just good, good or good.
Given this, we can conclude that Satan was never required to begin with and the fact that you claim that he does exist is evidence that the deck is stacked against man.
It's not enough that man needs to make a choice between belief and non-belief, God is required to inject the devil into the details in order to make things even more difficult.
Cheers,
--Caldron68