They may know what "shame" means, but they don't know what it is.
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What a true statement. That is why they are quick to point out failings of a conservative, and do not feel in the least hypocritical when doing so.
Lib-Dem shamelessness continues: Since they think "shame" is a construct by mankind in his "thirst to invent a God"; they feel no shame in using the tool "God" for their own use. And of course, this is also why Dems can't cope with disasters or terrorists. They are so busy using the "shame stick"; they just can't be bothered to actually do something constructive. "Dialogue" is everything in the liberal psyche. Everything to them is a "construct". It's outside of them, with the real them, always striving to be "free" inside a construct they've created which will never allow them to feel "free".
This is not healthy mental behavior. And they think the key is to modify the standards as to what is healthy and what is not healthy mental behavior. There's real solid psychological descriptions that could be "inserted here"... to describe the liberal "mind".