Even if the Antichrist is Assyrian by birth it does not mean that he is Muslim or that he had been living in that area prior to the days when the world headquarters is moved to the area of Babylon.
For example, Some Americans call Obama an African but by Africans he would be called an American. He once lived in other nations but now he resides in America.
I think believing that the Antichrist is Muslim can be a big danger and a trap because I believe the real Antichrist comes into power through the wars against Islamic fundamentalism.
Perhaps one might think that Daniel was given information about the Antichrist, but not necessarily about his ancestral roots.
However, Daniel refutes this presumption in that it gives us the most detailed literal account within the entirety of scripture as to the origin of this individual.
Therein we are informed that the Antichrist will originate from the people who would eventually destroy the city of Jerusalem, and the sanctuary, referring to the second Jewish temple.
There are two primary arguments against the Eastern leg being the leg from which the Antichrist comes: the “Historical” and the “Prophetical”.