Well, I'm not second-guessing Our Lord, just musing.
His ordaining will produces nothing but Good.
The paradox is that free will in his rational creatures is a Good, but can be used for evil. The evil is something God permits, because of the greater good: free men, even flawed, are better than flawless robots.
God's permissive will is exercised because he can bring about good way, way beyond the evil that men and demons intend. In the end this will be manifested: "you meant it for evil, but God meant it for good." (Gen. 50:20)