If I am cheated or betrayed, I will react.
If the Sri Lankan government resorts to state oppression against the Tamils and Muslims, then we will fight.
What you have to assess is whether you have the will to fight.
A small nation can fight a superpower with determination and dedication.
However formidable a military power you may be, you cannot impose upon a people anything against their will.
India claimed to have intervened in Sri Lanka to secure Tamil interests. In actual fact, India came to secure its own interests.