After a very good season opener (another fine Stewie/Brian-episode), this episode was just boring.
The episode has three parts: first the Kathy-Ireland bit, then Peter trying too hard to be Jewish, and finally Peter fighting against being Jewish. The first part has nothing to do with the rest, it only kills off time. I have no idea why they included it - the main problem with parts two and three is that they don't go anywhere, because they are both too short.
Also, nothing in this episode was shocking or exceptional. Come to think about it, I have no idea what this episode was actually about.
I saw two good jokes in the whole episode - Stewie saying "I hate it here" and Quagmire's left arm. But the latter joke was immediately destroyed by Peter's reaction. So all in all, I laughed once.