If you sincerely believe God's design of all things was to create sin, then you have things backwards. Now can you chew on that, and rephrase yourself so that the public isn't misguided to believe your implication that God condones sin to promote His Will.
Oh, how they twist and turn on the spit when the truth is stated! I did not say God created sin. Nowhere have I ever, EVER, said that. You read, but you do not understand.
I said God created Lucifer, knowing he would rebel, and created him anyway, because that rebellion was necessary to God's Plan. Read that very carefully. Who sinned? Was he forced to sin? Was He ordered to sin? But God knew He would sin, did He not? One of two things is true given those facts: Either God did not want Lucifer to sin, in which case Lucifer upset the apple cart, so to speak, and God had to alter His Plan, OR, God had already planned for Lucifer's sin, and therefore Lucifer, while thinking he was causing God problems, actually established God's Plan. I'd bet my money on "B".
What is that Plan? To allow Rebellion to play out to the end of the line, to show sin for all that it is, and how it is not stronger than God, nor can any rebellion ever succeed. To defeat sin and rebellion utterly and totally, so it never again plagues God's Creation. In order to achieve that end, sin is a tool in God's Hand. He turns the results of sin to do His will, to the Praise of His Glory. The chosen glorify God in His Salvation. The Wicked glorify God in His Justice. In all this, he does not sin, nor is sin chargeable to Him. He utilizes rebellion against Him to ultimately glorify Himself, and to destroy rebellion in the process. That, my friend, is the Omnipotent, Omniscient, Almighty God in action, and it is a wonder to behold!
Who put the tree of Good and EVIL in the garden ?
Where did the ability to sin come from?