Nationalism is the kind of disease that will make you fall in love even with the negative aspects of your nation. You will start worshiping your country.
Our Pakistani nation badly needs to understand that our Holy Prophet Muhammad PBUH and his Companions conquered the world by not sticking to Arab nationalism and culture but by breaking the curse of nationalism.
One can follow and live his culture but under the rules of Islam. If the culture is exceeding the boundaries of Islam, then that is a problem.