Presence Of "Evil?"

[CaptObvious]

Is God willing to prevent evil, but, unable?
Then that would mean he's not omnipotent, right?
Or, is he able, but, not willing.
Which would mean he's malevolent.
Or, is he neither able, nor, willing, in which case why do we call him God?

I've asked this question a couple of times to some Christians that I've known, and haven't received a lot of logically sound answers, shall we say.

I've heard it all boils down to free-choice. I've heard he's a jealous God. Look

In which I case I ask them then their God is Jealous and maleovelnt which are qualities inherent in a perfect being?

Since Sklansky brought up the whole general topics, I just thought I through out this horseshoe to see what people thought. :-)