As anyone who has delved into the real (unofficial) backstory behind virtually all of the major wars and conflicts over the years knows, the “noble cause” is never, ever the real reason, the “noble lie” never, ever justified. And the “cause” will never be the real reason—or the “lie” rationally justified—whilst we as a species continue to tolerate those within our midst whose congenital and moral defects push them towards these ends.
We, as a species, go along with it on purpose or are too dupe by it to even know. Those who don't go along are marginalized or tortured into submission or imprisoned forever or murdered.
That's why some people call this here-and-now Hell.