Historically people living East of the Indus have been the same people. Some present day Pakistanis who live east of Indus in areas like Punjab and Sindh have historically been proud Hindus and Hindustanis and part of our Indian civilization. However, once these parts became Muslim in th elast 500-1000 yrs, they became alien to us.
So now they are different people, but they were our people while they were Hindus. Raja Dahir was part of our civilization, so was Raja Porus, and Ranjeet Singh.
me
These people were never part of anything hindu, 99% of Indians are gond tribal like creature. Pakistani chuhras indeed have many things common with your kin.