You do what you are told by Prophet, just because a Non-Pakistani is doing something wrong or against the Prophet and teaching doesn't mean you have to follow their route as well, yes people are against the concept because they were indoctrinated for centuries about fending for themselves, or the fear of death was embedded within their hearts, material stuff, Power , women, and money corrupts the minds and hearts of people and Leadership hence you see the fall, unity is the only solution for Muslims to have some sort of say in world politics, if they want the world to hear them they have to join their voices, even Allama Iqbal knows and understand this, that is why he said " United we Stand, Divided we Fall ", Also we can't even say that we haven't seen a successful model of unity among the people makes them stronger, Europe is right infront of us, Powerful they are as long as they are united as a Union the moment they start to leave the union they will be open to many threats from the Power hungry people across the world.
Pakistan has potential, no doubt it that, they can lead, help, and even make themselves heard in the world if they want to, but when you are weak and constantly bombarded by enemies from all sides, and World Powers trying their best to weaken you, turn you into a pile of rumble, further Isolating yourself within your borders and promote nationalism will give you a false sense of power and strength, even Nationalism once get out of hand can destroy a country, as we saw with Italy and Germany in the 20th Century, Look what happens in America in last 4 years of Trump, Nationalism turned into White Supremacy and it hurts the Fundamental Idea of America which it was founded upon, and when the heavy minds realized that they vote Trump out of office before that blind nationalism, fake patriotism and entangled with White Supremacy took them on a self-destructive path. Look at Arabs of today, you think they are doing good? their countries might look good financially and so on but all of it is because they are towing in the line giving to them by US/Israel the moment they try to make an independent foreign Policy, suddenly nationalist voices start to rise, rioting breaks out, calls for reforms turn deadly and you have a civil war that leaves the country into pieces, Syria and Libya are prime examples of it, KSA UAE QATAR all of these countries are housing American troops for their security, if they are so Powerful militarily and financially why they need American troops and technology, Yes they are scared and they have no choice now, they can not even ask Americans to leave now, this is what happens when you try to fend for yourself and isolate yourself from others.
We Muslims should be thankful that Allah provided us with such amazing guideline and religion which tells us how to live, behave, conduct our business, politics, and Military and it all connects our worldly gains to the spiritual gains which every Muslim try to reach within its life, but we abuse, forgets and completely disregard our religion, our laws hence we are nothing when it comes to the worldly affairs.
“We were the most humiliated people on earth and God gave us honour through Islam. If we ever seek honour through anything else, God will humiliate us again.”
― Umar ibn Al-Khattab