BYU professor Ralph Hancock (somewhat) recently argued that modern liberals have thrown away morals altogether.
Okay, professor. I'll take your "moralier than thou" and raise you a "extra super duper moralier than thou":
Modern conservatism teaches that it's okay to pollute (it's not illegal!), abuse employees (it's just business), be prideful (WE BUILT THIS!!!), to be warmongers (but we're spreading freedom), oppress the poor (increasing my bottom line helps everyone...eventually), oversimplify rape (the body can shut that right down), reward the wealthy for their wealth (because the only way to get wealthy is to work super hard...), punish the poor for their poverty (...and the only way to be poor is to be lazy), place extra burdens on families with handicapped children (cutting spending on after school programs is just one of those "hard choices"), blame victims (too bad you wore that to the party), destroy families (you and you: stay here; you and you: time for deportation), promote selfishness (every man for himself!!!), turn a blind eye to racism (ain't nobody got time for race), reject science (global warming is just false guys), and impose my religion on you (and if you don't let me you're infringing on my religious freedom).
There, see how much better we all feel? Now that you've proven that I've rejected morals, and I've proven that you've rejected morals, we can both go home knowing that we've cried repentance to the heathens.
Or wait. Maybe reducing entire groups of people with whom we disagree to the worst immorality we can imagine isn't actually how we're supposed to do it. Maybe conservatives aren't a bunch of rabid hatred-spreading demons wreaking havoc wherever they go. And maybe liberals aren't godless heathens rejecting goodness and desecrating everything Godly....
It's way easier just to point fingers and pretend that the other side drowns the puppies of morality in the river of political stupidity.