From his latest column:
Discredit the message by discrediting the messenger. That's what a lot of this anti-Tea Party rhetoric is about, and the resort to it is understandable when the monstrosity being defended was brought to us through endless exaggerations and an ideology at war with America's having a decent future.Read the full column here.
But I think there is something else at play besides defending a position, and it is a leftist conviction that those who do not see the world the way the left sees it are lacking in compassion or intelligence and are inferior for other reasons, to boot.
The name for this is bigotry.