It is narrated by Abu Dawud that the Messenger of Allah (saws) said, "He is not one of us who calls for 'asabiyyah, (nationalism) or who fights for 'asabiyyah or who dies for 'asabiyyah."
"The Messenger of Allah [SAW] said: 'Whoever fights for a cause that is not clear, advocating tribalism, getting angry for the sake of tribalism, then he has died a death of Jahiliyyah.'"
Nationalism is the behavior of the jaahiliyyah and has no place in Muslim society. Nationalism goes against the very nature of Islam because it calls for unity based on family and tribal ties. As well know, in Islam, deen goes far deeper than blood. "The believers are nothing else than brothers (in Islamic religion). So make reconciliation between your brothers, and fear Allah, that you may receive mercy." Nationalist forces and tribal prejudices stood stubbornly against this revolutionary message of Islam in the and continue to serve as a barrier today.