I don't know if you are a Calvinist. Do you hold to reformed theology?
Anyway, most Calvinists staunchly oppose the idea of God looking down the corridors of time and then predestining something to happen. The problem is when it comes to Adam's sin, and God having planned to send a redeemer "before the foundation of the world", Calvinists are put into a box because if they reject the idea that God saw Adam would sin and then preemptively created a redemption plan, by necessity they have to accept that God caused Adam to sin, which of course they deny, but it is the logical conclusion to their theology.
Question?
Did the sin of the devil have anything to do with the creation of Adam?