“Nay but, O man, who art thou that repliest against God? Shall the thing formed say to him that formed it, Why hast thou made me thus? Hath not the potter power over the clay, of the same lump to make one vessel unto honour, and another unto dishonour? What if God, willing to shew his wrath, and to make his power known, endured with much longsuffering the vessels of wrath fitted to destruction: And that he might make known the riches of his glory on the vessels of mercy, which he had afore prepared unto glory,” Romans 9:20–23 (KJV 1900)
Nice twist. It's not a matter of man being able to dictate to God, but that if God created sin then that means either that there is darkness in His nature or He went against His nature. If either of those is true, He can lie. Which means everything we know about Him is untrustworthy. Now, if He is trustworthy then we can hold Him to be the kind of God He reports Himself to be, which would be a good and loving God and in order to be loving it must be something we recognize as good and loving otherwise the words have no meaning and again God is capable of lying.