we faced backlash from unsc from past to present . goa liberation war where us Kennedy tried everything to stop liberation because Portuguese is in nato league UN security council resolution condemning the Indian invasion of Goa but Russia vetoed it next is 1962 war with pak is in seato league so obviously us supported pak With declining stockpiles of ammunition, Pakistani leaders feared the war tilting in India's favor. Therefore, they quickly accepted the ceasefire in Tashkent. Despite strong opposition from Indian military leaders, India bowed to growing international diplomatic pressure and accepted the ceasefire. On 22 September, the United Nations Security Council passed a resolution that called for an unconditional ceasefire from both nations. The war ended the following day.we could have win that war in 1972 bangladesh liberation war again pak US ambassador to the United Nations George H W Bush introduced a resolution in the UN Security Council calling for a cease-fire and the withdrawal of armed forces by India . the reason for us support is simple pak is in seato Soviet Union vetoed out the resolution, thus letting India fight for the cause.
UN: China vetoes Indian resolution condemning Pakistan over the release of mumbai attack mastermind Zaki-ur-Rehman Lakhvi http://thediplomat.com/2015/06/why-china-snubbed-india-on-a-pakistan-based-terrorist-at-the-un/ "China has in the past blocked India’s bids to get Jamaat-ud-Dawa (the political arm of Lashkar-e-Taiba in Pakistan) added to the United Nations Security Council’s terror list three times (JuD was finally added to the sanctions list in December 2008). As leaked U.S. State Department cables revealed in 2010, China placed “technical holds” at Pakistan’s request to block UNSC sanctions against Lashkar-e-Taiba and the al-Akhtar Trust (a charity front for Jaish-e-Mohammad, designated as a terrorist support organization by the United States). A similar “technical hold” was put in place in the case of India’s request to list Syed Salahuddin, a terrorist wanted in connection with numerous Hizbul Mujahideen attacks. Thus, China has a history of shielding Pakistan-based terror groups from sanctions under resolution 1267."