To be perfectly blunt: yes, but not “war” in the traditional sense as most think about it.

It’s war in the sense that Russia is currently waging against the US and the EU, which is a much broader context than traditional military conflict. So: NSA, CIA, FBI, MI5, MI6, DGSE (France), AW (Poland), (n.b. Germany conspicuously absent, as they’ve allowed an LOT of Russian influence to get into their institutions in a LOT of places, and that is going to take a while to root out) etc. take the gloves off, as the FSB has been doing for literal decades. If they want to fuck around and pull the “little green men” bullshit on NATO territory, help them find out what happens by responding to any incursions of that variety with a division or six of armored cav lined up on the borders. Massive increases in air defense; likewise for marine and submarine threats - specifically, figuring out and catching up to very interesting and surprisingly capable non-acoustic submarine detection and tracking technologies that the Soviets devised later in the Cold War, and that the Russians continue to use and refine.

More simply: this is the Cold War 2, right now, today. We’re in it. We need to fucking act like it.