Indians commonly pass misconceptions as "facts", such as Afghanistan being strategic depth for Pakistan against India. Really? Really? How so? Afghanistan was only used by Pakistan to kick out the soviets and support Taliban afterwards (and Taliban had high support). They did not use them against india in Kashmir. Kashmiri freedom fighters were not Afghan Taliban. So in no way did Pakistan use Afghanistan against india.
But GoI relies on this misconception to send intelligence (and possibly military in the future) to Afghanistan. And indian public think they are doing the right thing. Ok, it's none of our business if you're trying to help Afghanis, but the fact of the matter is we know the real reason why you're there, and that reason makes it our business.
Actually post '93 when US threatened to declare Pakistan a terrorist sponsor state. A lot of training camps were shutdown in Pakistan and transferred to Afghanistan. If you refer to for example Arif Jamal's "The Untold Story of Jihad in Kashmir", you can see that many Pakistanis would undergo training in FATA and Khost province located camps. Moreover, we have foreign groups like OBL's AQ setting up their own training camps in collaboration with the locals.
Infact, when Bill Clinton launched cruise missile in Afghanistan in response to the Embassy bombings and"declaration of war" in'98 by AQ, it attacked a Harkatul Ansar camp in which fighters traiing for Kashmir were killed. Ahmed Rashid in his book Taliban also refers to this.
There is the other case of Kandahar hijackings, the single biggest failure against terrorists by GoI. People like Saeed Sheikh and Masood Azhar (both Pakistanis) were released where one would go on to kill Daniel Pearl and both would possibly plan more attacks against Indians.
The Taliban were not actually happy with the untoward attention. Their foreign policy had been subverted by these terrorists outfits and agencies that supported them.
So yes Afghanistan has been used against India. Since this was not happening pre-92-93 and hasn't happened since post 2001, the situation has turned back into its historical state.
On the question of whether India is using Afghanistan to create trouble in Pakistan, until the "suitable time" for Gilani and co. comes to present the proof its still speculation. On the other hand, the Afghan govt. and intelligence chiefs have stated that phone intercepts have indicated ISI role in bombing of Indian consulates, Bangladeshi ministers have alleged that Musharraf himself had visited ULFA leaders and of course there is the covert support to a number of NE rebels through Bangladesh. A number of individuals arrested by the Nepalese authorities have pointed out anti-India activities like fake currencies involvement. Even Pakistani diplomats were sent back from Nepal once they were detected by the Nepalese authorities themselves.
Christine Fair of RAND who was the only person to sort of allege that Indians were up to something, (but not what the Pakistanis say they are, apparently) has said
""The problems with the Pakistanis is that they lie too much and so, that when they tell the truth, no one believes them."
......
Fair said the US inability to compel Pakistan to stop its funding and support to all extremist groups was actually what was behind the instability in South Asia, and pointed out, "Let's remember, that it was a Pakistan-based and backed terrorist group, Jaish-e-Mohammed, that attacked the Indian Parliament, which brought the largest mobilisation of forces throughout the country, both of them to a near-war crisis with the spectre of nuclear escalation."
http://www.defence.pk/forums/strate...nd-who-infuriated-india-offered-key-post.html
So lets not forget that it has been Pakistani nationals or groups receiving Pakistani backings through training or monetary funds that have been used against India in Afghanistan, Nepal and Bangladesh and for the last 20 years.
So yes maybe its still possible its true, but credible evidence has to be placed on the world stage. Right now we only have rhetoric and "proofs" for domestic consumption which will have its anti-India affect, but will backfire in the long term as it will strengthen the political Islamist forces including TTP type groups.
The main focus should be to curtail these extremist groups that have undermined Pakistan and its people and the agencies that used them as foreign policy tool. Its high time to realize that there is no military solution within this context.