Don't get your dhotis in a twist...
Anyone even remotely familiar with the Afghan-Soviet conflict would find the assertion that India didn't support the Soviet-backed regime laughable. Even in the UN resolution condemning the Soviet aggression against the Afghans, which had won a vast number of votes, India did not vote with their conscience and instead supported the Soviets by abstaining.
India stands to loose it's billions in Pakistan, we don't really stand to loose much at all. Already before the Americans leave, their harsh criticism of Pakistan is showing the Afghans that we really aren't on the American side. Infact, when the Americans were insinuating that the Haqqani group was based in and influenced by Pakistan, statements from the Afghan Mujahideen leadership countered this, and unequivocally stated that the Haqqani group was a part of the Afghan resistance movement against the Americans - the Afghan resistance sided with Pakistan and tried to provide Pakistan some breathing space by contradicting USA's blaming Pakistan for the Haqqanis.
Suicide attacks were an unheard-of thing in Pakistan, unlike India which treats it's own people like they were some inferior people living under foreign colonization, we didn't have the dozens of insurgencies and freedom movements that India is having. So once the US leaves and Afghanistan dries up as a source for USA and India to meddle and fund in Pakistan, things stand to improve alot.
People familiar with the history of the 80's would know that during the Soviet-Afghan war, there were many bomb blasts in Pakistan - the ISI chief Retired Gen. Hameed Gul talked about the "gadr" that the Indian RAW was spreading here with KGB's assistance. When the Russians left, India had to quietly quit it's game and wrap their operations up without achieving anything substantial.
I guess that's a major difference in the collective psyche of Pakistanis compared to Indians. Ethan Casey, an American author, notes this in his book "Alive and Well in Pakistan". He writes that Pakistanis, as a nation, tend to look for blame inside. Even if something happens and it is shown that an enemy was behind some blast/attack, people think that it is our fault that the enemy got the opportunity to commit such acts. In his trips to India however, everything got blamed on the ISI. Just like we've had Indians taking advantage of our weaknesses and orchestrate a dozen "Mumbai attacks" in Pakistan, the Mariott hotel bombings, etc. And yet, right when the Americans are trying to pressure Pakistan, Indians stage their "Mumbai attack" and raise all this hue and cry, trying to get maximum political mileage by blaming Pakistan.
Then it all turns out to be a fake. The "list of terrorists" they give is embarrassing, as many people on the list are already in Indian jails, where they have been for years. When pressured to give their "dossier of evidence", the Indian government slyly hands over some gibberish documents in Gujrati, as a delaying tactic, because they have no real evidence to show. And even in the eventual English dossier that they give, they cite as proof that Pakistanis did it, the "fact" that these people were carrying dozens of soaps manufactured by a wide variety of Pakistani companies, Pakistani detergents and talcum powders. Utterly ridiculous "evidence".
So, when the Americans leave, another terror campaign of India's falls flat on it's face. The only people it really managed to fool were it's own. Even segments in the American media(Alex Jones' famous radio show coverage especially) pointed at the double-game India was playing, letting it's people be killed for political mileage.