Can't say I agree with your perspective here. IMO, what he's saying in that second half is still in the context of what is wrong with the Republican party - that once the president decides something, the party leadership expects no other Republicans in a different branch to challenge it, and works to get everyone in lock step behind whatever the executive decides is best for the party. I don't think he's talking about the Iraq war specifically, but in general about the party.
No disagreement from me here. I have serious reservations about him, hence the "reconsider" wording.