Since you now say you didn’t mean the Roman and Assyrian Empire were PRECISELY the same, in what linguistic, historical, cultural or political sense do you consider them the same?
This “Levant” has also been ruled at times by the Egyptian, Babylonian, Persian, Greek, Arab, Crusader, Fatimid and Ottoman Empires, among others.
What is the specific connection between ISIS/ISIL/IS and the Romans and Assyrians?
BTW, the difference between the meaning of ISIS and ISIL is minimal. Historically, Greater Syria referred to the area now controlled by Jordan, Israel, Palestine and Lebanon as well as Syria. Levant and Syria were very nearly synonymous.
Also, what is the relevance of the Assyrians? They never destroyed Jerusalem or its temple. That was done by the Babylonians, the empire that succeeded Syria.
Google (Assyrians Jerusalem)
shalom b'SHEM Yah'shua HaMashiach