Hypocrisy, or variation on Edmund Burke

(Notwithstanding the fact that the quote I'm about to attribute to him might not actually have been something he said)

Hypocrisy is a product of laziness, not a deliberate choice. People don't choose to be hypocritical; they're only too lazy to hold themselves to the same exacting standards as they demand of others. Or they adhere to fashionable or orthodox viewpoints, and conveniently neglect to sort out the troublesome conflicts between those viewpoints and their own beliefs and actions.
Hypocrisy is a disgusting creature. But it may be an altogether accidental one.
Burke (may or may not have) told us that, "The only thing necessary for the triumph of evil, is for good men to do nothing." Now it seems that the only thing necessary for one to be evil is for one not to do anything to be good.