Kerry Welcomes New Palestinian Authority PM

I am deeply disappointed with Kerry as the Chief US diplomat. He has no idea of how diplomacy works at all. You don't just show up, as Secretary of State of the US, make your position known and expect everyone to fall in line. It does not work that way, not in the Middle East.
Before what Kerry does will work, all other avenues of advancing one's agenda, particularly the military avenue, must be exhausted, then you talk.
In Syria, with Russia sending weapons and Iran paying the tab and sending in Hezbollah fighters, Assad is not to the end of the military avenue, he is just starting. Unless the US gets busy catching up with the Opposition, there will be nothing to negotiate. Assad will have liquidated his Opposition. Japan talked after we bombed Hiroshima. Germany talked after we firebombed Dresden. Assad will not talk until he has faced military defeat. We must come to the aid of those who can deliver that outcome on the field of battle.

Israel is like Syria is the point, or should I say vice versa, Syria is like Israel. As long as Israel has the upper hand, militarily, it has no incentive, and will give no concession to the PNA. If Israel ever loses the upper hand, then it will never give any concession to the PNA out of weakness.
This is how Israel plays the power game in that neighborhood. So everyone plays by the same rules, especially Assad. If you have the military advantage, take as much as you can. If you lose it, then hunker down. The only way to change the status quo is as was done in Libya, drag the autocrat out of the sewer by his ear and then summarily execute the bastard.

The WWII analogies work. Both Nazi Germany and Imperial Japan were fanatacally nationalistic states where the Great Leader, either the Fuhrur or the Emperor exercised absolute authority. To break that, you had to break the entire country, and the US and its allies had to go to that extreme in order to change the equation.
Assad is this way. As a Syrian tin horn dictator, he is small potatoes. He wants to create regional problems so that the cost of his disposal will be greater, possibly more than those who oppose him are willing to pay.

So what will it take for Israel to make peace with the PNA? It will take Israel calculating that the cost of withholding peace is greater than the cost of maintaining the status quo. As long as the US does not impose any cost on Israel for maintaining the status quo, then there will be no peace.
When the US shows that it is willing to impose financial sanctions on Israel for resisting US efforts to end Israeli settlement building, and that we are willing to make it stick, then Israel will go to talks with the PNA.
But as long as the AIPAC keeps the Republican Tea Party on retainer, AND the Democratic Party on retainer, don't hold your breath.