Why do Pakistani Christian’s look South Indian & Asian ?

I’m not trying to be rude or anything, but I’ve notice a lot of Pakistani Christian’s tend to be very dark and have flat noses while others look Asian, with slanted eyes and high cheek bones. A few seem look indistinguishable from there Muslim counterparts. But many seem to look very different. I’ve never seen a Pakistani Muslim with a flat nose before. But it seems to be very common for them to have flat noses. Am I the only one who’s noticed this ?