Answer:
The nationalism is prohibited in Islam. In Islam there is only one community, made of all the Muslims. All the Muslims are brothers to each other, and there are not superior or inferior Muslims, but according to their fear of God. Prophet Muhammad said: An Arab is not better than a Non Arab, and a white man is not better than a black man.
The nationalist speeches today are just a mean of manipulation, and most of the Arabic states were founded by the Western Powers, at the beginning just as mandates or colonies which later gained independence.