Originally posted here by rcgreen
I believe that the Problem of Evil presents just as much of a difficulty to all of the other religious and philosophical systems as it does to Christianity.

It is not instant proof of atheism, because, if you assume that there is no god, and no devil, and no sin, you still have to answer, "why does evil exist?"
"Evil" isn't a clearly definable term. It is a term that has changed throughout history, and will most likely continue to change. At one point in time, black people were considered evil. At another point in time, there were groups of people who thought that mass-murdering millions of jews was a good thing. And today, there are people out there who consider technology of any kind evil.

Good is whatever an individual likes, evil is whatever he doesn't like. Most religious systems attempt to teach people their view of good and evil. Good and evil are, like taste, in the eye of the beholder. How good or flawed the logic is behind choosing good and evil is a different matter.

Originally posted here by rcgreen
If you are a Satanist, and you believe that God (if he exists) is evil, and Satan (if he exists) is fighting a battle of liberation against the totalitarianism of God, you still haven't answered why. Why does the evil one seem to have so much power, and why do terrible things happen?
You are not talking about Satanists. Satanists do not believe in any god. You are talking about Luciferians or Devil-worshippers.

Originally posted here by rcgreen
Some religions try to duck the issue by denying the existence of evil.
Either it is an illusion, or it is "good" in disguise.
Not only religions do this, and it isn't "ducking" the issue. It's simply nature, how things work. A world where nothing happens you don't like is an unrealistic dream. Like I said before, if evil is different for each person, evil as a global definition is an illusion.

Originally posted here by rcgreen
In fact, I bet there are lots of people who deny the existence of "evil" as we define it.
This is probably because we are all individuals. Who are you to dictate your definition of good and evil onto others?

Originally posted here by rcgreen
In fact some of the most predatory and conscienseless people boast that the rule of life is "survival of the fittest", and are entirely happy with the world in its present state.
I actually do think it's "survival of the fittest," although I'm definately not happy with the world in its present state. I can assure you that, against your obvious prejudice and generalization,
that I am not conscienseless.

Originally posted here by Donkey Punch
Making things easier, evil exists because man by nature is selfish. Man makes rules, religion, and whatever else to place limits on man's never ending wants.
I agree with you that, like any other animal, man is a selfish being. There should be practical laws in place to control man to a certain degree. Man being a hypocrit and denying his own nature is an entirely different matter. This way of thinking brought extremely "evil" ideas into this world.