morally repugnant 

adj. Causing revulsion to people who have high moral values, moral standards, and moral character.

Most people who do morally repugnant things would have higher moral standards themselves if they weren't trying so hard to offend someone.

The very fact that they know the most morally repugnant things to do indicates that they know better.

morally repugnant by Downstrike May 26, 2004