You can't put the horse back fully in the barn. I applaud you for trying to help some poor sap trapped in demands made by his fiancee's adveristing-brainwashed mind, but as you note, not "everyone" is "trying" to be less stupid -- your wife isn't letting go of her cartel (and possibly blood) diamond.

This issue is squarely in the women feminists' court, and (for the most part) they haven't taken up the cause to stop supporting this evil system that hurts both men and women.