ouch
Will be forgotten. The US has conducted such "mistakes" before both on military and civilian targets which has resulted in zero voices from the Afghan government. Afghanistan doesn't care bcz the ones running Afghanistan are only interested in their power and if the US launches Nazi Germany like concentration camps in Afghanistan filled with Afghans even then the government won't care. An occupied country.
Karzai has criticized USA numerous times
http://www.cnn.com/2013/11/04/world/asia/afghanistan-karzai-pakistan-taliban/index.html