I don't think this is Amazon targeting Anthropic, but the government shaking down Anthropic using Amazon. The government is a key customer of Amazon, so Amazon will provide cover as needed. Amazon knows their equity stake in Anthropic is not particularly at risk, and they only gain negotiating power by looping in the feds.

Security is a real concern. Security experts within the government should create public+private working groups to validate all the leading models (by the same standards). Leaving it to companies to share with friends is wishful at best. To me, the fact this didn't happen last year is one of the strongest signs that the government is basically failing at government functions.