The Palestinians need to do themselves, and the world, a favour: Get united. This is another chance to do something concrete about peace with Israel. Don't blow it, please.

Listening to the Israeli prime minister's address to the US Congress yesterday, I sensed a leader ready to seize the moment. He seemed quite genuine. And a touch frustrated. No matter. He has made an impassioned plea for peace. The Palestinians must take up the challenge in good faith.

We must all help find the way, the will, and the zeal for both parties NOW.

To achieve this, the Palestinians must stop the crisis going on in their ranks, in their land. It is as unhelpful as it is patently harmful. To find and keep friends in the peace process, they must be united behind their elected president. Fatah and Hamas bear equal responsibility for peace. Yes. They must uphold this sacred duty. Today.