The US state department lawyers and the British House of Lords have evidence. That’s why they’re pursuing convictions of the Chinese leaders involved. No, wait— sorry, I misremembered. They both concluded there is insufficient evidence.

NATO’s purpose is to guarantee the freedom and security of its members through political and military means.

https://www.nato.int/nato-welcome/index.html

It would seem that NATO itself disagrees with you.

Edit: NATO are the imperialists. By any definition. Please read any of the following authors’s works on imperialism/empire: Hobson, Hilferding, Lenin, David Harvey, John Smith, Michael Hudson, Zac Cope, Anievas and Nisancioglu, Samir Amin, Giovanni Arrighi, Paul Kennedy, or Niall Ferguson.