Lol. You honestly think NATO countries wouldn't check the story before comitting to an open conflict they don't want to be in? That the people in all of Europe wouldn't want to know who actually blew up the plant and spewed radioactivity over their lands? That everyone's just gonna be fine shelling out ANOTHER couple of billions to clean up Chernobyl 2.0?
If this ever actually happens (Big IF) anyone who lies about it is gonna be completely fucked when the truth inevitably comes out.