I recommend such people to read Indian History before claiming that there is none in history book. I guess all their knowledge comes from school level books. So to grow the horizon the twitter poster should read "Cambridge History of India" to begin with. (not the new one, old one which was published somewhere around 1918-1924; and is freely available as out of copyright),
Should also read "Rulers of India" series by some British officer on Akbar and Lord Clive. (should be free on Kindle, or other sites)
For Maratha History, do read 'History of Maratha by James Grant Duff, 3 volumes' (free of copyright)
Siyar-ul-mukhatarin by Ghulam Husain Khan (Tabatabai) (English translation available) for Mughal History AFTER Aurangzeb