If you did you also noted he's a pretty well respected military historian. His works are used in our war colleges and on the USMC recommended reading list, probably others. I wouldn't dismiss him out of hand.
He makes some very valid points. Israel will not win a war of attrition, or a cycle of terror/retaliation, which is how they are allowing the Palestinians to define the conflict.
There are other options he doesn't mention, such as a decisive military move to capture and annex a large chunk of the West Bank, resettle the population as needed. Thus far, Israel hasn't the will for that.