No, they aren't embarrassed or ashamed because one of the central pillars of liberalism's assault on the culture has been to purge any notion of shame. Shame and embarrassment are the product of social judgment, and liberalism will have none of that (except their own brand, of course).
Public figures who highlight and exhibit bad behavior in large public forums ( like Miley here) are admired, and lauded, mostly because they set the bar so very, very low for the rest of the tribe. They haven't purged Shame, simply restricted its use for those who don't genuflect to the tribe and instead expect themselves and other individuals to have personal responsibility for their actions. Such people are axiomatically racist, bigoted redneck haters largely because they believe they have a right to their opinions on such matters, and don't celebrate the bar being set so low. The only . Shame in the lefty fascist world is brought about only for refusing to be ONE OF THE HERD, for maintaining individuality and that individuals are responsible for their own actions and thier own lives. For the heresy of denying the proclamations about what is right and what is wrong made by the shepherd. By not wanting to be able to escape the consequences of bad actions; By not wanting to make others pay the costs of irresponsibility; For not perceiving WORK as the enemy, decency and civility as foolish and having the audacity to actually proclaim there is an objective reality not subject to the childish whims of the Statists you should be ashamed.
The Liberals ARE embarrassed. Embarrassed for YOU - for thinking there was such a thing as an individual. Yes, Shame is a product of social judgment, but by siding with the herd, they make themselves immune from such judgement - for the herd won't ever hold you personally responsible. Leave a woman to drown in a car, kill an intern, send pictures of your pecker out, join the KKK, womanize to your hears content, keep bribe money in your freezer. You are a Democrat - all is forgiven. They give you an alibi for life. They give you freedom from personal responsibility. Anything you do wrong is the fault of "society" and "society" should pay for it. Just like Filner's legal bills. No raindrop is responsible for the flood. No man is an island. No one exists without the tribe, and the tribe is all that exists. That is why they have no standards but the double standards.
The only person who lefties think should be ashamed is the one who points out all that is Bullsh*t.