Only Israel would provoke a war with both at the same time. Israel's real motivation is to involve America, just as happened vs Iraq. The IDF is not even up to taking on Hizbollah right on Israel's border. In fact, it has been more than a decade since the IDF had anything they could spin into a victory. The past ten years have been all bad news.
UN: Gaza could be 'uninhabitable' by 2020 if trends continue (AP)
from the article: Israel and Iran are fighting a war of nerves