That's great that German police are trained to react that way. But American police are not. American police are trained to prioritize their own safety and survival above the safety and survival of suspects or even innocent bystanders. There's no consideration of intention or what information people are acting on - if there's a potentially lethal threat to the policeman, it must be dominated and suppressed.

So yes, with a practical understanding of how American police train and operate, this outcome is completely expected.