God didn't allow evil!  But He did allow creatures the freedom of choice, He gave us emotions that make us able to comprehend certain things, He gave us a free will so that we were better able to understand the love that He shows us.  If we were unable to make our own choices that would basically make us robots,  so no God didnt create evil, he just made satan in a way that was more intelectuall and emotion based than any of his other creations and because God gave satan the depth to decerne good and evil, satan chose evil....
hope that makes sence 
God Bless   

Yup. Romans 9:19 predicts exactly some of the reactions that you see here, and the "free will" doctrine, that people made up because of confusing the sovereign will and creation of the Lord as something that butts heads with personal accountability. God created evil for the reason I mentioned earlier in this thread, and the good pottery he creates is contrasted by those he makes for "common use." (Paul was slandered for making comments like this, while others twisted the doctrine)

God made evil. God made people who do evil. All of that to separate from Himself, to contrast light and dark.

Some of the other statements are also true: On the human perspective, God allowed it to show the powers of mercy of judgment, making that light and dark separation in man (that is, their lives). That is also why healing--and miraculous healing--come from God as signs that glorify Him. Essentially yes, it is the Lord's pleasure to separate light and dark.

God allows evil in the same way that the sun allows the night. He creates evil in the same way turning off a light in a room creates darkness.

The light shines in the darkness, and the darkness has not overcome it.

"And this is the judgment: the light has come into the world, and people loved the darkness rather than the light because their deeds were evil.
For everyone who does wicked things hates the light and does not come to the light, lest his deeds should be exposed.