You might just as well say that the drone strikes are the fault of the individual operators. If a private operator does something in their capacity as a government contractor, then that's the government's responsibility.
It’s the same deal here, the company is 100% at fault, the government might also share some responsibility or not depending on the specifics. As to drone operators, “I was only following orders” isn’t a free pass though I was given bad information might be, the government can also be responsible at the same time.
Which isn’t to say these drone operators are going to end up at The Hague, but they and their superiors should at least be invested.