There are many Nordic looking people in parts of India. Burusho,Chitrali,Kalash,Pashayi are the few to name. Now in this AHC,make them more populous to say about 35-40% or more of India. And those people only fit into this challenge.
Now with the WI part. How would this affect the history of India and the Whole World later?
Caste system not developing and hence a more open and a prosperous India mostly on par with Europe at the Age of Enlightenment?
Different kind of religions more closer to Norse,Roman and Zoroastrian religions and a different religious influence elsewhere?
More connection with Europe and Persia?
Demographically different Middle East and more similar to Europe?
And how would all this affect the later days of development of the whole empires and civilizations?