Based on The Kite Runner, what has been the relationship between the US and Afghanistan during the past 50 years? How has that changed since 9/11?
While Hosseini does not discuss in detail the relationship between the US and Afghanistan in The Kite Runner, he does use Baba and Amir's conversations and actions to provide some information on this subject. The beginning of the book is set during The Golden Age of Afghanistan (1970s). Through Hossein's writing, one can tell that prominent businessmen such as Baba appreciated American capitalism and entertainment. Baba takes the boys to see American movies and buys a modern American car (the Mustang). America is also the place Baba considers first when he decides that he must leave Afghanistan. He settles in California along with many other Afghan refugees; so Hosseini demonstrates that many Afghans chose America as a place of refuge when they fled their war-torn homeland.
Hosseini makes Baba a fan of President Reagan's policies namely because he was known for pushing democracy and for supplying the Afghan resistance movement (against the Soviets) with funding and weapons. Carter had the started this, and Reagan increased US support for the Afghans. At this point, the US was a supporter of Afghanistan, but only because they were at war with our arch enemy--the Soviet Union during our Cold War.
In answer to your second question, Hosseini does not address much about life in Afghanistan after 9/11 except to imply that America's involvement over there after 9/11 is a positive one. He does so by mentioning that it is safe enough for General Taheri to go back to Afghanistan after the US sends troops there and by having Amir and Soraya begin funding for an orphanage in the "new" Afghanistan.
Overall, Hosseini produces a positive view of the relationship between the United States and Afghanistan, and I think that this is in keeping with the perspective of most Afghan-Americans.