Why do people from india make it look like that bangladeshis are lower caste dalits when even central indians are darker on average?

Most Indians are mildly to severely dark. Indians who belong to lower caste have less indo Aryan genetics, so they lacked knowledge about vedas. Secondly, Bangladeshis were low caste Hindus who got converted to Islam. 

It is an Indian problem, many tend to be racists, against their own people.  

You all look the simply brown to the rest of the world

They are all a bunch of hairy brown smelly poop in the street chattering monkeys that keep calling me up and trying to sell me insurance for a vehicle I don't have.

I couldn't care less...

Why is skin colour related to caste position anyway? Such a a stupid system.

It's appalling the concerns with skin colour in India leding people to try to light up their skin.

I think darker Indians have a very beautiful skin colour and much more beautiful than light skin Indians. Just my opinion.

Why do south asians obsess so much over color? 

To the point that it plays a big role in their societies

Even go to the length & bleach their skin

Be happy with who you are

This bleaching and tanning thing is silly and dangerous

And in the west surgeries are more common. I know

People in western countries get surgeries like boob and butt implants 

or get the brazilian procedure

In korea they get eyelid surgeries

So I am not singling only south asia out in physical alteration. Though people have a right to do as they like

My problem is when it gets dangerous

Apart from some Kashmiris, Some Punjabis, Some Pahari people and Some Brahmins, the vast majority of Indians are dark brown. Bangladeshis on average are dark brown. Pakistanis on average are light brown/medium brown.