Well 1971 was not "done" by India. It was triggered by Operation Searchlight and the refusal to hand over power to Mujib who had been elected Prime Minister of Pakistan. There was no way India was going to absorb the millions of Bengali refugees and there was no way they were going to go back while East Bengal was under martial law. War had become inevitable in March 1971. India just waited for the ideal time to launch military operations.
Siachen was an undemarcated area and neither country had a permanent post there. Neutral sources hold that India took Siachen only because they recieved intelligence that Pakistan was planning to do the same. In neither case was there the backdrop of a historic peace summit like the one between Vajpayee and Sharif following the bus ride to Lahore. Pakistan can feel upset about both 1971 and 1984 but both should have been anticipated by intelligence agencies given the state of the relationships between the countries at the respective times and neither was a betrayal in the sense that Kargil was. More importantly, it was a betrayal not just of India but also of Nawaz Sharif - who was not told the truth until it was too late. The Indian army never carried out such rogue operations behind the back of the political leadership
As for the rigged J&K elections in 1987, it was another of many blunders by Rajiv Gandhi - who was probably the worst PM India had. History proved that this had terrible consequences like many of his other decisions, including the one that led to his assassination, but it was within Indian territory and I don't see how you can draw an equivalence with a major rogue operation across the Line of Control. Pakistan itself is no stranger to rigged elections. They are not an excuse for India to start a war.
