"...they should see their leverage clearly: Republicans badly want entitlement cuts, but they don’t want them enough to trade for taxes. They badly want to replace sequestration, but not enough to trade for taxes. And they badly want tax reform -- but, again, not enough to trade for higher taxes."
I saw this with the sequester too. Now I'm not a partisan who wants the Dems to extract more concessions through wily negotiations, but I'm happy to see someone else being practical and clear-headed in their view of the negotiation process.
Extra. You could also think of these fetishes as 'taking a trophy' or capturing your opponents' flag. It is the sweet victory of humiliating your opponent. It's not a smart goal, but sometimes we really want to do it.