Well, that's that!

To be honest, while I completely understand the impulse, the decision sounds more emotional than rational. Your tone is quite angry. You may not care about fallout right now, but you may later on. Would it work out any differently had you taken another course of action? There's no way to tell, but it seems like opportunity lost.

Your grandfather at least cares, however misinformed he might be. I'm familiar with the various "types" of Mormons (I'm LDS, and no offense taken at all, BTW), and they typically have good motivations.

I hope things work out for you. Sometimes a confrontational approach is necessary, but more often it introduces yet another piece of drama to overcome rather than reducing it.

Lea