God is Providential, so God is behind all which comes to pass...
The Bible says that Desire gives Birth to Sin, God Desired that Sin Exist; so is God a Sinner? Not at all. Gad told Moses that he could Kill Israel and start a new People through him; but Moses said no way. Why? Because God would break his Promise Abraham, Isaac and Jacob; God did not really desire that. In Jeremiah, God said it never entered his Mind to 'Cause' Judah to Sin. Since God IS Omniscient, it did enter his Mind that Judah would Sin; but it never entered his Mind to 'Cause' Judah to Offer their Children to Molech...
I'm not used to Calvinists not agreeing with the WCF or the 2nd LBCF...