Also, if they concede anything as morally right or wrong much of their liberal moral relativism collapses.
So true.
Pope Benedict said that relative morality is the worst scourge of this century.
http://www.lst.edu/academics/landas-archives/373-dictatorship-of-relativism
I agree of course as relative morality lets folks be their own "god." Someday there will be a reckoning for all those baby killers and their supporters.