No, the thing that links them all is war - it's incredibly messy and people have been killing the wrong people in wars for as long as men have been fighting.
I'm not saying this applies to all US military personnel or that other militaries do not have problems.
Deploying air forces in an expeditionary capability is difficult and expensive. It's much more difficult than deploying a ground unit. Few forces have this capability.
When you're in Afghanistan, and 90% of the CAS sorties are performed by the U.S., then it stands to reason that if an incident occurs, it'll likely have been a U.S. aircraft based on odds alone.
It's probably drifting out of scope of this conversation, but it can probably never be reemphasized enough that these will be the consequences of any war, and as such, a war should never be seen as a favorable outcome. In that, I definitely agree with you.