1) Working on US border security is bad.
2) US Soldiers are good. Even though their job is ultimately for border security and border security in other countries.
Is it that they see the idea of a defensive military as good and tolerate it doing any amount of bad as long as it might also do good too? Are they following the Nuremberg defense of soldiers not being accountable for their actions as long as they're following orders?
Does 1) extend to other countries? Is border security for, say, Nigeria a bad thing? Or is it a good thing if it's enforced by Nigerian soldiers and bad if it's enforced by more efficient technology?