To answer the question, I'd say, mostly, cuz them pushy, righteous, pious, hypocritical fucking Cristo-theocrats wanna keep shoving THEIR version of some mystical, long-dead, zombie-'god' creature into the fabric of law and gummint with which EVERYBODY would be compelled to comply.
Knock that shit off, and we'll settle the fuck right down. Promise!
"The demand from the Oligarchs for civility amounts to a feces-soaked ball-gag shoved in the mouths of the powerless to rob them of the force of their anger." ~~ Dr. Woody, 2011.