I guess the whole point seems to be that people (companies) "does not take similar measures against other countries who wage wars which have caused way more deaths and displacement of individuals".
Also, your questions are apparently laid in a way so everything has to fit in order to not accept a commit, or requiring to know exactly how many war crimes have been commited to answer about "the half". Asking many questions like that is a known tactic I don't appreciate.
I'm not talking about numbers, or "which is worst". I'm talking about a guy going to work knowing that his work can kill innocents (yes, even working in/for the US too), and having his patches accepted, as a contractor (or in the supply chain) for some army.
Not everything is good/bad, right/wrong. It's a very ingenuous way to look at the world, and there are a lot of conflicts going on right now (for example https://www.cfr.org/global-conflict-tracker/). Are you tracking all of them? For the last 10 or 20 years too?
There is a lot of conflicts have been in the last 70 years indeed, but author (and your cite) says: "does not take similar measures against other countries who wage wars which have caused way more deaths and displacement of individuals" and I'm pointing that this is a false statement, because not author nor you can't name any one