They want to buy time to be able to reach their full "Final Solution" capacity. Israel cannot allow that, and I'm sure the US and most of NATO members also share such vision. If it's not now, then when??? Waiting to see is much like a replay of the 1930's... and only an idiot can allow this to happen again. The stakes are high now, but within 1 year or 2, they will be extremely higher, out of control.
Shaffir to Herzog: Opposition failed to show leadership in political battles against PM (Haaretz)
from the article: Iran cleric: Israel wouldn't dare pursue its 'foolish' military threats