Re: Martial Races of sub-continent
Mohenjodaro is but just one city in a vast territory inhabited by Indus Valley people. Harappa of Punjab belonged to the same civilization. Sites belonging to this civilization are widespread, running from Eastern Afghanistan to Western India (Gujrat). Probably even beyond.
So narrowing it down to one area, only because ONE city was unearthed from there, would be falsification of history.
Sindhis do belong to that civilization but so do Punjabis, Brahuis, and other parts of Northern India where Urdu/Hindi is spoken.