Oooooook... well, that sorta goes back a bit.. and on a bit... but i don't think i need to read all of it to be sure of my reply to you...but thanks for taking the time to find that for me
Is that just a Muslim thing though?.... cus, isn't Islam pretty much the same as most religions, in that sense?...For instance, Christianity is like a parent religion, whereas CofE and Catholicism are the "sects"... and I'm preeeeeetty certain that a devout Catholic wouldn't do well to be marrying an Atheist, for example... they also happen to have very big differences in their "beliefs".. and where and how they worship...so it makes sense that they don't all worship in the same places...
and just as a side issue... you use the word "racial" segregation, when surely, you mean religious? or cultural?.... after all, by your own definition... race is merely about colour of skin...
I think that the issues of why many pakistani muslims would not marry african muslims are racial not cultural. They look down on people based on the colour of their skin. And many arabs`look down on them.