This is because the US saw the Taliban as a stabilizing force which will ensure smooth flow of the well stored Middle east oil from the Gulf to the Western Countries.
In other to demonstrate total support, the US did not provide any arms or financial resources to the Taliban,but the alliance came from the fact that the Taliban were anti Iran,(US antagonist) and anti-Shiite. They(US) believed that the support from Taliban will enable them to gain an allies against Iran, and for smooth channelling of oil pipeline routes out of the Gulf region through Pakistan.The reason was that these pipeline routes should be under her(US) allies in this case the TALIBAN. The plan was that if the pipeline route would be through the Pakistan to the Gulf.Hence a good Arab Allies would be needed.
Japanese, Korean, and South Asian immigrants also arrived in the continental United States starting from the late 1800s and onwards to fill demands for labor.
