Just because ISIS was used as mercenaries for Clean Break doesn't mean they weren't trying to put their guys on someone else's soil, and the ultimate goal of Clean Break is Greater Israel, which requires Israel's boots on ground from the Brook of Egypt to the Euphrates. If you aren't putting your boots on their ground, you don't want to win.

Just because ISIS was used as mercenaries for Clean Break doesn't mean they weren't trying to put their guys on someone else's soil. If you aren't putting your boots on their ground, you don't want to win.