If somebody trusts me, then I will reciprocate.
India claimed to have intervened in Sri Lanka to secure Tamil interests. In actual fact, India came to secure its own interests.
What you have to assess is whether you have the will to fight.
People cannot give up their cause, their rights, for fear of defeat.
If I am cheated or betrayed, I will react.
When I was deciding to fight, the thought of winning or losing didn't bother me.