To understand terrorism in India you'll have to shift your focus inward, and a bit of Paki history. Anyhow, regarding 8, 12, etc.. a continuation..
Afghanistan never succumbed completely to Taliban, Kabul, Kandahar, Mazar-e-Sharif and the Pashtun areas did. When Najibullah was castrated and dragged through the streets (he was a great Big B fan and hosted him only a few months ago) the world did condemn it but very weekly. His daughter is Indian/Delhiite btw and is a mass-comm/video-journalist/photographer. It could've been stopped at that point and one Afghan I met was very positive about his regime, however many disagree with it as evident by his public execution. He was trying to secularize his country and bring in Foreign Investment (Khuda Gawah was shot during that time).
The Northern Alliance, mainly Tajiks and the northern tribesmen, kept fighting the Pashtuns/Pakistani Army which supported the Taliban. They were supported by India, Iran and Russia. And ofcourse, by the USA in 2001. Karzai was one of the leaders of this faction.
It is little known that Iran tried to open Channels to the US after 9/11, to use their sea-to-Af routes for US supply lines. This was not even considered seriously by the US, but IMO would've been much better for Af than the present Pak equation.
Karzai (and the Northern Alliance people till now, like Saleh) are very devoutly anti-Pak (and by extension, Pro-India).
THe present government is kind of a coalition of sorts between Ghani, the Pres, and Abdullah Abdullah, the close second whose the "CEO".
Ghani has a different approach than his predecessor. With the "you can't chose your neighbor" philosophy he has decided it would be best for Af to not be belligerent with Pak. Accept that Pak will continue to support Taliban as long as India exists and is trying to negotiate with them. This involves giving them face-saving concessions, such as reducing Indian involvement. Pakistan does its own cosmetic concessions, and vows to work against the Haqqani network which they were supporting by this time. Ghani hopes that by showing a visible tilt towards Pakistan, and relying on Chinese investment to compensate for Indian, he can bring peace within his borders.
Sounds like a good strategy and hope it works for them, but the real solution imo, has to be more fundamental.