What they did is the same thing that the UK did regarding Julian Assange. They requested the US go through a legal extradition process. I suppose you could also claim that the Brits are hiding Assange from Sweden and that Sweden, just like the US is justified invading and occupying the UK and installing a pro-Swedish government.
If what Julian Assange had done was anything on the level of what Al-Qaeda had done who knows what action would have been taken to bring him to justice. The Taliban had/have no legal extradition process to go thru.
By GARETH PORTER
CounterPunch.org
February 8, 2011
The central justification of the U.S.-NATO war against the Afghan Taliban – that the Taliban would allow al Qaeda to return to Afghanistan – has been challenged by new historical evidence of offers by the Taliban leadership to reconcile with the Hamid Karzai government after the fall of the Taliban government in late 2001.
The evidence of the Taliban peace initiatives comes from a new paper drawn from the first book-length study of Taliban- al Qaeda relations thus far, as well as an account in another recent study on the Taliban in Kandahar province by journalist Anand Gopal.
In a paper published Monday by the Center on International Cooperation at New York University, Alex Strick van Linschoten and Felix Kuehn recount the decision by the Taliban leadership in 2002 to offer political reconciliation with the U.S.-backed Afghan administration.
Citing an unidentified former Taliban official who participated in the decision, they report that the entire senior Taliban political leadership met in Pakistan in November 2002 to consider an offer of reconciliation with the new Afghan government in which they would “join the political process” in Afghanistan.
Shattering the Myth of Taliban / Al Qaeda Ties | The Global Realm