Who said the "end of human civilization"?

I specifically said "respond with the use of force as permitted by the UN Charter and international laws and norms."

It seems clear the people responding talking about all out war and "end of human civilization" don't have much experience with the UN Charter, security council and international laws and norms for the use of force. Generally the legal terms of art I used.

The idea is a proportional response to deescalate future cyber warfare attacks...not end all of humanity.