The high Calvinist doctrine of God's sovereignty including evil as part of God's plan, purpose, and determining power blatantly contradicts Scripture passages…[God] never tempts anyone (James 1:13). To be sure, Calvinists have clever but unconvincing explanations of these and numerous other passages of Scripture. R. Olson, Against Calvinism, 98-99.
Let's compare Jas 1:13 to another passage:
Then Jesus was led up by the Spirit into the wilderness to be tempted by the devil (Mt 4:1).
In this passage, Satan is the actual tempter. Yet his role is instrumental. Jesus is led by the Spirit of God in order to undergo temptation. So, indirectly, God is behind the temptation, as a part of his "plan and purpose."