It was a given that as soon as the Israelis left, the synagogues would be the first to burn. That's what they do. They hate Jews. It's instilled into their minds from Day One. They learn it at school, and they believe with all their hearts that Jews are their blood enemies.
I am generalizing here, because I know that there are quite a few Palestinians who just want peace, who are willing to work with and live with Israelis. But, they are far from the majority. It's really sad. As a Jew, it's really hard for me to support the Palestinian cause. They've shown over and over and over again that they hate us, and will do whatever it takes to drive all Jews into the sea. It's pathetic.