Tricky issue....
I generally don't think that if the MB outs the treaty that it means they want war... more likely they want a political leaver to use when dealing with Israel and political points from their neighbors.
Having said that, I totally understand why Israelis would be very nervous about this move.
wa:do
Israel and it's main economic and military support, the U.S., is losing it's grip on the Middle East via the Arab Spring movement toppling Israeli/U.S. supported Arab dictators friendly with Israel and the U.S. even when this was always a minority Arab opinion in Middle East countries subjected to centuries of foreign control.
One notices a pattern in European colonization and takeover of non-European lands which is that when European colonists fail to substantially outnumber the indigenous populations those native peoples will eventually take back their countries, e.g. India, e.g. South Africa, e.g. Rhodesia, and eventually, Israel. By 2050 the Palestinian (Arab) Israeli population will outnumber the Israeli Jewish population in Israel. What's going to happen then to the Zionist goal? This future scenario scares Israeli strategists and so Israel is promoting war in region hoping to do another blitz war with America on its side to destroy first Iraqi competition, then Iranian competition, and any other Arab nation that dares to defy Israeli hegemony in the Middle East, such as a new Egypt might do given the immense and unending animosity in all Middle East Arab nations generated by the Zionist takeover of Palestine.