Well, Clark Pinnock, for instance, used to believe in Calvinism. Time will only tell if he renounces Open Theism. Scott Hahn and Gerry Matatics used to belong to Reformed churches, and now they are promoting Catholic heresies.

True godliness is a sincere feeling which loves God as Father as much as it fears and reverences Him as Lord, embraces His righteousness, and dreads offending Him worse than death~ Calvin