“This is Russia’s aggressive war against Ukraine, which is a blatant violation of international law,” NATO Secretary General Jens Stoltenberg said.
“And according to international law, Ukraine has the right to self-defense. And it also includes strikes against legitimate military targets, Russian military targets outside of Ukraine. That’s international law, and of course, Ukraine has the right to do that to defend itself.”
Trump not withstanding, the US is a huge part of NATO, and NATO wouldn’t say something like this without US government backing, or at least consent.