Progressives tolerate everything from polygamy to gay marriage to marriage with animals to sex with dead bodies and children. Once you allow for one, then you might someday begin to tolerate more things. It is tough to draw a moral line subjectively speaking because our point of view changes as we move closer to the lines of morality that we draw for ourselves and the lines become blurred and becomes like rainbows and the moon because the lines keep moving backwards and we will always want more and more of the darkness like that RING in The Lord Of The Rings.
http://DrudgeReport.com