I don't think you can. However, "Dravidian" is a racial classification that covers that entire group which includes Pakistanis, Sri Lankans, Indians, etc. This is necessary because "hindu" doesn't cover Pakistani, "Indian" might mean the Mesoamerican peoples, some Indians aren't hindu but we still don't want them here, etc.
SPOILER: The perpetrator is a Dravidian.
How does anyone tell pajeets apart without being a pajeet themselves?
I don't think you can. However, "Dravidian" is a racial classification that covers that entire group which includes Pakistanis, Sri Lankans, Indians, etc. This is necessary because "hindu" doesn't cover Pakistani, "Indian" might mean the Mesoamerican peoples, some Indians aren't hindu but we still don't want them here, etc.