I had trouble taking the article seriously after this
"Anthropic did not partner with the Pentagon to make money. They did it to help. They did it under a mutually agreed upon contract that Anthropic wants to honor."
The only thing Anthropic cares about is money. There is no other motivation for anything it does, military or otherwise.
Seems like you and the author are doing the same thing: speaking in absolutes. It's possible for "Anthropic" (or the summed vector of all the human decision makers within it) to have contracted with the military because it wants to make money AND it wants to help.
The questions are: "Help with what, precisely?" and "How much money versus how much value (/principles) compromise?"