Every now and then the left discovers someone who tells them what they already think, but puts a glossier edge on it, and elevates him to the status of "Serious Thinker". This is the office for which Peter Beinart has been briefly nominated.
The chief prerequisite for becoming a serious thinker on the left is to state what is obvious to the left without actually seriously considering its obviousness. This is what Peter Beinart delivers by providing an indulgence for leftist Israel bashing by telling the bashers that they aren't bad Jews, it's the Israelis who are bad Jews, bad Democrats and bad people all around.