The retaliatory threat from NATO has always been to wipe out Russian forces in Ukraine with conventional weapons, not to attack Russia with nukes...that would justify Russia sending its nukes back to NATO countries and would immediately trigger China and other nuclear countries to consider launching theirs. Macron is not undercutting anyone.
EDIT: Lol, Nintex, I love you dude, but your source is Business Insider which is basically live journal for idiots who fancy themselves journalists. There are basically zero editorial standards.