If you live in US, taxes you pay directly fund DoD. So if you sponsor their activities, why can't Anthropic do business with them? Which other company would you rather get their (your) money?
We all wish that everyone who has ever lived in such a situation has had the bravery to resist. Right?
But I don't think that makes forbearance of such resistance equivalent to taking money from that same actor in exchange for expanding its capability. Those are related but distinct types of transaction.