Being anti-stupidity (as in "anti-Iraq-war") is hardly "loony left". Yet another poll today shows 60% of the American public outright opposing the war but of course you'll say that polls aren't valid and don't mean anything (unless presumably they're favoring your position, right?)
Look around and talk to a few people that aren't members of the Oil Executives Club, the Coalition of Bush Supporters, the Fox News Sewing Circle, the local chapter of the KKK, the Americans for Bombs, Guns and Destruction Club or the Federation for Good Old Fashioned White Christian Male Supremacy in your area and ask 'em what they think. The opinions out there are overwhelmingly negative towards this administration, where they think the nation is headed under current leadership and certainly about the war. I've spoken to all manner of people - ardent right-wingers all the way to "out there" left wingers and the common ground they almost ALL have is that this administration is a failure and that the war is a bad idea. Instead of focusing on ways to differentiate people, this country needs unification and people that can focus on ways to bring them together. I just gave two examples. Let's start with those and try to mend the huge rift that's tearing our nation asunder right now. What do you offer? Oh, more division, more intolerance, more hatred, more name calling and more damage to a nation under the guise of "supporting" it.

Okay.
Nobody wants to see a "loony left" Democratic platform any more than we want to see a "radical right" Republican platform. It'd be far more discriminating (given our nation's lack of alternatives and predelection towards silly party politics in the first place) to have a battle over near-centrist positions than extreme-left versus extreme-right. Ultimately the latter is only divisive and more destructive to the nation as a whole.
I blame BOTH parties for polarizing themselves. Neither has the moral high ground right now of moving more centrist - both have done the opposite and in doing so, are contributing to the destruction of the nation.
Although I think Lieberman is a fool for supporting the war, it only goes to show how politics really is. If he'd changed his mind and come out against the war, he'd simply be accused of "flip flopping". If he'd stayed the course (as he did) he'd be accused of being bull-headed and obstinate and out of touch with his constituency. Damned if you do, damned if you don't. Nobody wins. . . Ironically kind of like the war itself.
Such is the sad state of our so-called "democracy" today.