One can find in the church those who have defended both positions outlined in the questioner's comments. God permits sin. It is important to note that these two answers have been given by people who are genuinely Reformed and Biblical in their theology, who want nothing to do with Arminian error, and who believe with all their hearts that God is absolutely sovereign in the entire work of salvation. Such is not the case. While the texts referred to in the question have to do especially with the sin of deception on the part of false prophets, a deception which God Himself claims to have done in these prophets, the broader question is all sin.
Sin is man's fault.
God is sovereign. God remains sovereign. God is sovereign over sin. That disagreement over this question has been present in Reformed and Presbyterian circles is evident from the fact that the Reformed confessions differ slightly on this matter from the Westminster Confession. Let us briefly look at this difference.