Yes.God's holiness cannot be impacted by what man does or doesn't do. Of course God is separate from sin. What is sin? Disobedience against God. By commanding man what to and not to do, God automatically makes man capable of sinning (disobeying). Can a country have criminals without a legal system? If no commandments are given, we can't break any. This is why the law is good but it yields death. This is why we need GRACE!
If God ordained all this, then why are we to blame?
Can Flowers Leighton resist God's will? Can Tom? Can I? Can the fish resist the dragnet?
I'm fairly certain @TomFL is missing what "who resists His will?" means, which is enjoined to the fact of God's sovereignty in exercising justice or mercy as He wills.
The man is complaining no one can do anything about it, and thus it is unfair for God to be God (to have mercy only on some, and not on others). He then blames God for still finding fault since He created each person however He desired, and, for whatever intended purpose He willed, all the while saving only some and exercising justice on others.
This finding fault with God is in essence still going on right now apparently: God is deemed by some on here as unfair (unjust) since, not if, He does as He wills and according to what He has revealed about Himself in his word. Ephesians 1 and Romans 9 express these truths nicely.
Instead of persons trying to get "God off the hook" (figuratively speaking) while trying to explain away these solemn truths, they ought rather embrace these truths, and bow in fear and reverence to this Holy Sovereign God.