Surpnaka was a shapeshifting, supernatural entity from Lanka. Dravidian or not is up for debate. For the sake of argument I’ll say she was.
She tried to seduce Ram disguised as a beauty, and when he politely declined- she became angry and charged to kill Ram’s wife out of jealousy. To this, Lakshman - in defense of Sita pulled out his bladed weapon and attacked her in the face cutting off her nose. She didn’t lose her nose because she was “Dravidian”. The epic you talk about talks about Lankans in very high regard in many ways. Even Ravan for that matter.
Now- Where did Ram rape Lankan/Dravidian women as your friend had stated? At least brush up on some material before you make silly posts to sound more legit Umar, you pendu.
Stop trying to connect these imaginary dots.