With all due respect, the Indus did not have an effect on the creation of Pakistan. If it did, Jinnah would not had been so adamant on Bangladesh being part of Pakistan. He also wanted Muslim majority parts of UP and Assam to be part of Pakistan, even though they are not part of the Indus. I think it was CHaudhary Rehmat Ali who came up with the Indus idea though
As for the Scythians and Khushans, they only ruled small parts of India for short periods of time. For the past 10 thousand years, only in the last millennium has major parts of India been ruled by foreigners.
I am not sure what you mean by Aryans, as that is a vague and scientifically incorrect term. I was just saying for most of India's history, India was ruled by indigenous Indian empires such as the Mauryans, Guptas, Cholas, etc.
And I am pretty sure Lahore has some fine Mughal monuments, but none of them are as visited as the Taj and Red fort.
By Bengal, you mean Bangladesh.
And the rest of your post is BS. The DS never ruled South and East India, and the Mughals only did for a short period of time under Aurangzeb before the Mughals got defeated by the Maratthas.