The allegation that OBL is still free because "they" want him there as an excuse to continue fighting is pretty far out there. Possible, of course, but still far out there.
Not if you're aware of all the details:
I don't know where such orders came from, but they had to be given. There were several alleged reasons the U.S. held back in pursuing Bin Laden, but the result was the same. You can see an interview with Seymour Hersh on Bin Laden's escape here.
Early November 2001: Al-Qaeda Convoy Flees Kabul
"Many locals in Afghanistan reportedly witness a remarkable escape of al-Qaeda forces from Kabul around this time. One local businessman says, “We don’t understand how they weren’t all killed the night before because they came in a convoy of at least 1,000 cars and trucks. It was a very dark night, but it must have been easy for the American pilots to see the headlights. The main road was jammed from eight in the evening until three in the morning.”
This convoy was thought to have contained al-Qaeda’s top officials [London Times, 7/22/2002]"
November 13, 2001: Al-Qaeda Convoy Flees to Tora Bora; US Fails to Attack
"Bin Laden gave a speech in front of about 1,000 supporters on November 10, 2001 in the town of Jalalabad, Afghanistan. [Christian Science Monitor, 3/4/2002] On the night of November 13, a convoy of 1,000 or more al-Qaeda and Taliban fighters escapes from Jalalabad and reaches the fortress of Tora Bora after hours of driving and then walking. Bin Laden is believed to be with them, riding in one of “several hundred cars” in the convoy. The US bombs the nearby Jalalabad airport, but apparently does not attack the convoy.
[Christian Science Monitor, 3/4/2002; Knight Ridder, 10/20/2002] The Northern Alliance captures Jalalabad the next day. [Sydney Morning Herald, 11/14/2001]"
"November 14-25, 2001: US Secretly Authorizes Airlift of Pakistani and Taliban Fighters
At the request of the Pakistani government, the US secretly allows rescue flights into the besieged Taliban stronghold of Kunduz, in Northern Afghanistan, to save Pakistanis fighting for the Taliban (and against US forces) and bring them back to Pakistan. Pakistan’s President “Musharraf won American support for the airlift by warning that the humiliation of losing hundreds—and perhaps thousands—of Pakistani Army men and intelligence operatives would jeopardize his political survival.” [New Yorker, 1/21/2002]
Dozens of senior Pakistani military officers, including two generals, are flown out. [NOW with Bill Moyers, 2/21/2003] In addition, it is reported that the Pakistani government assists 50 trucks filled with foreign fighters to escape the town. [New York Times, 11/24/2001] Many news articles at the time suggest an airlift is occurring. [Independent, 11/16/2001; New York Times, 11/24/2001; BBC, 11/26/2001; Independent, 11/26/2001; Guardian, 11/27/2001; MSNBC, 11/29/2001] Significant media coverage fails to develop, however. The US and Pakistani governments deny the existence of the airlift. [US Department of State, 11/16/2001; New Yorker, 1/21/2002] On December 2, when asked to assure that the US did not allow such an airlift, Rumsfeld says, “Oh, you can be certain of that. We have not seen a single—to my knowledge, we have not seen a single airplane or helicopter go into Afghanistan in recent days or weeks and extract people and take them out of Afghanistan to any country, let alone Pakistan.”
Mid-November 2001: Afghan Politician Says US Policy Prevented Bin Laden Capture
Ismail Khan. [Source: US Navy]Independent warlord Ismail Khan’s troops and other Northern Alliance fighters are reportedly ready to take back Pashtun areas from Taliban control at this time. Khan, former and future governor of Herat province and one of Afghanistan’s most successful militia leaders, later maintains that “we could have captured all the Taliban and the al-Qaeda groups. We could have arrested Osama bin Laden with all of his supporters.” [USA Today, 1/2/2002] However, according to Khan, his forces hold back at the request of the US,
who allegedly do not want the non-Pashtun Northern Alliance to conquer Pashtun areas. (SO WE CAN KILL THOUSANDS OF CIVILIANS AND TAKE TERRITORY IN IRAQ, BUT WE CAN'T DARE DO THIS IN PASHTUN?????......YEAH RIGHT.)
British newspapers at the time report bin Laden is surrounded in a 30-mile area, but the conquest of Kandahar takes weeks without the Northern Alliance (see November 25, 2001). However, more reliable reports place bin Laden near Tora Bora by mid-November (see November 13, 2001). [CNN, 11/18/2001]
Lots of information here.
It goes on and on and points to either criminal negligence or purposeful deception.