Crises are normally short, sharp and intense affairs. Israel's predicament has developed on a different time frame, is more diffuse than most crises and has not reached a decisive and intense moment. But it is still a crisis. It is not a crisis solely about Iran, although the Israeli government focuses on that issue. Rather, it is over Israel's strategic reality since 1978, when it signed the Camp David accords with Egypt.
Perhaps the deepest aspect of the crisis is that Israel has no internal consensus on whether it is in fact a crisis, or if so, what the crisis is about. The Israeli government speaks of an existential threat from Iranian nuclear weapons. I would argue that the existential threat is broader and deeper, part of it very new, and part of it embedded in the founding of Israel.