NATO has never attacked a country. Its Article 5, mutual defense clause has been activated once. After 9/11 to protect America. In the last decade, Russia invaded Georgia, invaded Ukraine twice in largest ground war in Europe since WW2, bombed Syrian civilian targets, successfully worked to pass BREXIT, helped elect an American president, murdered British citizens in Britain, shot down civilian airliner murdering 289, including Americans. So yes, anyone not under Russian influence could see that NATO is the definition of defensive alliance.
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