I totally disagree… Pakistani people certainly do think they are better than others if they belong to a certain tribe. And those that care about it, do look down upon those that are not of the same zaat as them … mabey not to the extent as they will not become friends with you or work with you or eat with you … but to the extent they dont want a person of that “zaat” to marry into your family.
Pakistan as a country hasn’t even been around for 100 years… it was all India for like centuries… its not that hard to believe that something that was practiced and is practiced heavily in India is still having effect in today’s Pakistan for this reason.