Some fires need to be allowed to burn out. So let the Shia and Sunni fight it out to the death. There will not be a victory for Shia against the Sunni world. At the end, there will be a stalemate, and Shia and Sunni, both ememies of Israel, will be exausted and weakend as a result of the war.
U.S. confirms ISIS computer expert killed in air strike (Reuters)
from the article: The victory won't be American