That pretty much explains it. They're still stuck back in the 60's.
Rather than progressive, we need to refer to them as the 60's regressives. They still haven't come to maturity.
"Here is the Democrats' problem: They have achieved every major goal they sought in the past 100 years. The party is losing because it won." -Peggy Noonan
Dems can't figure out what to do with themselves. The less imaginative remember "Hey man, like, we got a lot of press with the anti-war effort! Wouldn't it be groovy to try that approach again?" And so we have people making asses out of themselves with disentions that are so easily rebutted that they just end up looking like idiots (i.e. "This war is about oil.")
You notice that a good portion of these people are only cheering for peace cause it seems like this fashionable retro thing?
Amazing how politics merges with fashion in some people's minds.