He keeps threatening to, and we should take him seriously on that
Not sure I would call what he said a threat. It’s more like laying out his warnings so that when the West decides their next move they have to consider it. I doubt they’ll consider it because, as Trump keeps pointing out, they are not smart. I’ll add that I don’t think the West has strong leaders and because of that they have to try and look strong and that’s what gets these wars really going.