alt Hacker Newsin those times religion was a scant sixth in order of reasons and rationalisations for conquest and empire, then as now it was a technological advantage, guns, and the rajputs didn't have them, mobility, the rajputs were agrarian, the mughals were mostly pastoralists and always on the move. but just so that you know, I have traveled through north west punjub, to muree, and lundi khotal, and there are ruins of stupas and things much much older that litter the landscapes, so to pick one particular starting point is disingenious, or worse.
The Mughal empire was founded in 1526 and dissolved in 1857. Hernan Cortés was born in 1485, reached the Americas in 1504 and conquered the Aztec empire between 1519 and 1521, very close to the Mughal conquests. There are whole academic disciplines based around criticising Western colonisation and conquests but I am not aware of anything similar targeting non-Western history.
My reaction is not so much targeted at this specific example - religious (Islamic) conquest - but towards the lack of criticism of non-Western conquest and colonisation.