What right does Russia have to murder Ukrainians?

WSJ headline is “Russia launches Offensive in East.”

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By what right? He is murdering Ukrainians and getting so many of his own people killed that he is too embarrassed to say how many.

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How can any nation abstain from condemning this? How can 83% of Russians support this? I know he controls the state media but 300,000 young Russians have left Russia because I'd the war. There are too many communications channels now for Putin to prevent people from knowing the truth.

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Putin is pure evil and defeating him is the only option.