"...their numbers are declining...."

But all the US churches are declining -- whether of the far right or the far left -- or those in between. 
Down, down, down US Christianity goes -- from 95% to barely 70% today. We shrink at different degrees, too. Since the 1960's, Catholics from 24% to 21% and Protestants from 65% to 46%. And it has all been thought out beforehand, Pandora666. lol