It isn't just the Right. The mainstream media has never understood Move On, or at least pretended not to. This is basically a group which formed and gained incredible support around the notion that Clinton should be censured, not impeached, which the wise old men of Washington thought was crazy until the sainted senator from Connecticut proposed it. Then they had the crazy idea that the Iraq war might not be such a hot idea.
And those organizations which thought impeaching the president over a blowjob and invading Iraq were awesome ideas are very serious indeed.