Anthropic does not object to its use for war. In fact Anthropic explicitly allows its semi-autonomous use in war, e.g. for identifying targets. They just won't permit its use for full autonomous war, yet, because they don't believe it's safe enough.

Since when has war been waged according to the whim of a corporation?

The tools will be used however the government wants them to be used. The government makes the laws and wages the wars, and the corporation will follow the law whether it wants to or not.

So either you are willing to work on a tool that is not under your control, or you are not.

I'm sure China doesn't care it's not safe... and there's the issue