And when we helped them it was for a purpose of defending the invasion of Russia, along with other countries, not just the USA
You are correct; the US was not the only country involved in supporting the mujahideeen rebels, but we led the war effort. Our interest was not in helping protect the lives of the rebels, it was to promote capitalism and stomp out communism. We didn't care much for the freedom fighter as much for our own personal interests and agendas.
Our agenda was for them to hand over Bin Laden and they refused. Again and again and again, so they were invaded. I'm not exactly sure how our agenda was forced on them, as all they had to do was hand over Bin Laden.
But if you believe the official story they didn't have Bin Laden, Pakistan did. Kinda like Iraq.. they didn't have weapons of mass destruction... oops!
I also don't know how our agenda is responsible for a Taliban rechime, that kept woman and children oppressed like it was the dark ages. Public executions of women in a soccer stadium, for having a televison.
Maybe because the country was caught in the middle of a political battle (cold war) in which two superpowers flexed their muscles at the expense of 2 million afghan deaths and 3 million displaced people. Not to mention the millions that became disabled as well as the million that fled to neighboring countries.
Maybe it was due to the stupidity of the geneva accords which pretty much left no plan for the future occupation of Afghanistan or for future governance. Once the soviets withdrew, our interest in the freedom fighter's well-being ceased. We didn't help in the rebuilding of a completely decimated nation. We just handed responsibility over to other corrupt nations which took advantage of the situation, built up strong relations with war lords, and eventually gave rise to the Taliban.