Moore would become as despised in the Repubican Party as Ralph Nader is for Dems, not that it matters.
The big difference might be if Moore is a SINCERE, life-long Christian acting on his beliefs.
If so, he will KEEP those who cross over to the "Big XYZ Party." And he will gather new ones.
Seriously, if Howard Brown was able to mobilize the Libertarians on a theme characterized by the as "ignore the rest of the world," then Moore will be able to mobilize troops around their common religion.