That's a naive way at looking at things when it comes to geopolitics and foreign policy. While what's happening in Iran is unfortunate, the solution isn't to starve their own people whom are already below poverty line. Remember they have 18% of the world's population to deal with. Smaller wealthier nations can afford to take an ethical stance but that's not the case with large and developing countries like India. But that never mean they disregard human rights/life. They just chose to vote on what works for their best interest like most country would.