"something truly awful", " a crisis like this" , "I don’t really know more about the history of the NATO alliance or Western pressure on Russia" ...

What crucial elements are we really ignoring in order to characterize this "truly awful something" that is happening as Russia's invasion of another sovereign country? What could it be that we are ignoring about "the history of the NATO alliance of Western pressure on Russia" that justifies the action of a militarily stronger country invading a neighboring country to overthrow its elected government?