Hmm... a poll conducted by a Palestinian body. This reminds me of an episode of "Yes, Prime Minister."

In the episode, it was shown how a poll could be conducted so as to get whichever result you would wish. It all has to do with the leading questions, before the main ones, when only the answers to the main questions are taken into account and published.

A poll favoring violence:
"Do you like your grandparents? Would oyu like to honor them, or their memory? Are you upset about the Zionist occupation of land previously owned by your grandparents? Do you support armed resistance against the zionists?"

A poll opposing violence:
"Do you feel concerned for the safety of your children? Would you like them to grow up in a peaceful environment? Would you like to protect them from undue violence? Do you support the violence between Palestinians and Israelies?"

I'm no professional pollster, but imagine what someone who is can do.