Isaiah 45:7 I form the light, and create darkness: I make peace, and create evil: I the LORD do all these things.
So now that we've establish the origins of evil. We will examine why indeed GOD created EVIL. See GOD created all things with the desire of freewill to serve him or reject him, mankind and the angels alike. Satan(meaning blackness or darkness) or the Devil as some call him was also created by GOD before the fall of 1/3 of the angelic host of heaven, Satans GOD given name was Lucifer. Lucifer was one of 2 archangels or the top generals, the other being of course Michael. Lucifer was the top dog, music was his main gig,(the BIBLE says Lucifers pipes sounded beautiful) GOD also called Lucifer the morning star the most beautiful of all GODs creations. However Lucifer like all the other angels was created with freewill to love and serve our creator or reject. Lucifer saw his reflection one day and became prideful, arrogant and envious, soon all these desires over came him to the point that he desired the THRONE OF GOD. So Lucifer had a secret town meeting of revolt with all the angelic host of the heavens to over throw GOD, and revolt they did. The Bible says that Michael and his army fought Lucifer and the 1/3rd fallin, and did cast them out of the heavens...The prophet John of Patmos believe to have written most of the book of Revelation, says that he saw Satan the evil one fall like lightning from the heavens woe be unto the inhabitants of the earth...Lucifers countenance changed to darkess thus given over to the name SATAN(it was his choice). Even after all Satan had done GOD still saw a use for him, GOd called him the destroyer.
GOD used SATAN to test Joel, one day Satan going to and fro thru the earth was bored, so Satan decides to pay GOD a visit and ask GOd do you not have one that i cant break or decieve, for i have decieved most all in the land. GOd eccentially says yes have you considered my servent Joel?? you can test him all you like, but you cannot take his life. So Satan did, he took eveything Joel had, Joel was rich and had a very large family. Satan took everything Joel had and struck Joel with diseases that dogs didnt even want to lick on, and killed all of Joels family, Joels wife even told him why dont you just curse GOD and die!! but Joel said no i will not forsake GOD tho he slay me i will still trust him. In the end GOD told Satan to back off, and all was totally restored to Joel everything... In another instance Jesus(GOD come in the flesh) told Peter(the head apostle) that Satan wants to sift him like wheat, in other words to see if Peter really was the servent he claimed he was, or put him thru the ringer like he did with Joel 1500 years pryor. In short Evil was created by GOD to seperate the rams from the goats, or the wheat from the chaff, those that except Jesus the Christ into their life, are marked by the blood of the lamb, those that arent are marked by the numbers of the beast. Its entirely up to us weather we decide to hold fast under all circumstanes to the love of Christ or give in to evil, plain and simple, hope this helps you in your vain quest of refuting morality as a GOD thing.......ALL THINGS ARE CREATED BY GOD INCLUDING EVIL.......................