If the Indians would have gone the King route alone rather than being on reservations they'd have been annihilated and you wouldn't even have been born. The token offering of the reservation was what they got in exchange for not fighting a losing battle to the last man, but the exchange wouldn't have happened had that not been on the table.
I think the ”Indian” there referred to India the country and Gandhi’s nonviolent protest as background
The poster you're responding to might be from the Indian subcontinent and not Native/Indigenous American.