I think there's a secret deal between US and Taliban ...

The deal between the US and the Taliban is NOT secret. As a matter of fact, the UN has had a copy of it since March of 2020.

In return for the Taliban no longer supporting worldwide Islamist terror, and allowing for power sharing in Afghanistan, the US will no longer target them and they will no longer target us.

The Taliban and the US are now coordinating to make sure roads to the airport are open to those who have visas to leave, but not to those who want to force their way on airplanes leaving Kabul. Apparently the Taliban were a bit too eager to enforce the rules, leading to some beatings, and delays in authorized people getting to the airport.

On Sunday the rumor mill sent Afghans in droves to the Kabul airport, in the mistaken belief that anyone who makes it to the airport can hop on a flight to the US, no questions asked. Given that 2/3rd of the population is illiterate, they could not be persuaded otherwise.

The rest of this crazy theory, is just crazy. The Afghan airforce is now outside of Afghanistan, so none of that equipment fell in the hands of the Taliban. Small arms and ammo, not clear how this was handled.

The prisoners release was part of the Doha accord, that happened in March of 2020. The release of the presumed new Afghan President (Taliban) from Pakistan was done under pressure from the US in 2018, as a good will gesture to get the peace negotiations rolling.