Ali, Iran is a liability for whom? For India or for your Muslim sentiments? What long term interests are you talking about? Would Iran sell India oil cheaper than what it sells the rest of the world to pursue long term interests? Would Iran sign a treaty to assist India in the event of a future conflict with Pakistan? Israel will. Israel has already assisted India secure our borders and stem to a very great extent the flow of Jihadis from Pakistan. Can Iran help us do the same? Israel has utter disregard for human rights. Really? So what about Iran? Is executing children and homosexuals respect for human rights? Is persecution of minorities respect for human rights? Is torture of political opponents to the regime in Tehran respect for human rights? At every level, Israel is a functioning democracy with a far better record of human rights as compared to Iran. India has every right to pursue policies that further her military and economic interests with every nation of her choice and such decisions are based on the hard reality on the ground and not idealism in some La La Land.
