That is just a trite sound-bite (one of many) conjured up by the hasbara brigade that has no basis in truth. There have been many many peace initiatives over the last 12 years - none of them introduced by Israel - but all rejected by Israel. The form of the Palestinian leadership has been subject to Israeli manipulation for years. You didn't think that by killing the Hamas political leadership (Dr Rantisi) and thereby allowing the military leadership to take over was an accident do you?
34 militant groups now allied to ISIS, UN chief says (AP)
from the article: The Israeli patriot’s final refuge: boycott