Why do people think all indians are the same? especially about us indo-aryans?

[Indo-arya Keshav]

North indians are indo-aryan and people think it is a myth well it isn't yeah okay fair enough some parts of south are hotter but that doesn't make your facial features change! south indians are dravidian and they are a different race it's really obvius to tell not all south indians but most of them tend to have curly hair , wider noses e.t.c. , and down north people have sharper features usually eyes are either coloured or dark brown , i've seen a lot of questions on here of people abroad especially america that indus valley never happened and we are the same as dravidians when we are not basically north indians don't come from africans dravidians do
, type in hrithik roshan on google images and you will see a north indian man and how different he looks from a south indian , yeah and some north indians are dark but you can still tell they are north because of facial features , so think before you stereotype next time