You are partly right, but not entirely correct.
Pakistan broke up because there were some traitors among us who were backed by India. Many among elites realize today that it was the greatest blunder to breakup Pakistan. We were a large powerful nation, now we are weaker more vulnerable nations. The other reason it failed was that there was distance between two separate landmass, so logistics was an issue. Another reason it failed was that Pakistan intelligence could not identify and neutralize traitors before they became too powerful politically.
Every ethnic group has racist feeling about the other race, this is true, but present day Pakistan would not survive if these feelings were too strong. India would not survive, if these racist feelings were too strong. People eventually figure out, it is better to team up and make a bigger team, which makes a winning team.
About Central Asians, yes they have their problems, but they also try to unite:
Central Asian Union - Wikipedia, the free encyclopedia
" In his proposal, the Kazakh President said:
"In the region, we share economic interest, cultural heritage, language, religion, and environmental challenges, and face common external threats. The founding fathers of the
European Union could only wish they had so much in common. We should direct our efforts towards closer economic integration, a common market and a single currency."
[4]"
If Hazara were Sunni, I am not sure if they would be as much persecuted. That is again a religious sect issue, not racial.
Kazakhs normally do not eat pork, exceptions are there in all groups, there are occasional pork eating Bangladeshi Muslims also, which I have seen.
Yes Muslims are quite diverse, but they also know that there is strength in numbers. So as it was in the past, when Muslim countries GDP per capita increase with time, they are bound to figure out what is in their strategic interest, which is to team up with each other, not in a meaningless ineffective OIC, but with increased economic, people-to-people and military interaction.
The challenge for Muslim countries is to develop their human resources and economy, once that happens, cooperation will increase.
So Muslims are not the same, but they can and will team up under the right circumstances, if they see benefit in it, even more so than in the past.
Muslims are one of the most heterogeneous people on earth. Traders, rulers, soldiers, preachers etc. traveled long distance and put down their roots in far flung places of the world and these early pioneers whose legacy still survives in Islamic communities as founding legend is difficult to understand for others who are not part of the community. Muslims did not suddenly discover Islam and became Muslims. It happened over many centuries of migrations, mixing and conversion. I can give you example of my own country:
Rise of Islam in Bengal, role of migration
And on Islam and racism: