Yes, in real life the truth is often that all participants in a conflict have morally ambiguous motivations and do bad things when they think they can get away

Yes, in real life the truth is often that all participants in a conflict have morally ambiguous motivations and do bad things when they think they can get away with it. It's OK to acknowledge that while also acknowledging that in a certain narrowly focused issue one side is less wrong and one side is more wrong. If you're arguing that young people should accept that Russia (which is already a complicated concept) is universally Bad and the western friendly powers (another nearly uselessly complicated concept) are universally Good then you're arguing for a false view of reality. Give the public a little credit, they can tolerate a little bit of moral ambiguity and still make a reasonable decision of right and wrong.