The best way to reform religions is to develop faster-than-light travel and send off all the sky-fairy believers to their own planets, where they can practice whatever back-assward beliefs they like. Or, if they want to stay I'll go.
The best part of this plan is that they don't like science enough to make their way off-planet or develop advanced planet-killer weaponry once one of us is gone.
This post brought to you by an Evangelical relative's response to me when we attempted to have a political discussions....to paraphrase, "End Times were coming so what is the point of worrying about the future?" was her basic mindset....