Little green men, cyber-attacks: who's doing it? It's Russia. Who is the number one source of cyber-attacks on European member states? It's Russia. Who is the biggest challenge in the potential of invading into the Baltics? It's Russia.
How can NATO not be Russo-centric when you have Putin and the Kremlin rattling their sabres about having the biggest nuclear arsenal in the world and about being prepared to protect Russian ethnic groups around the world wherever they might be? From a military standpoint, looking at protecting your citizens, how do you not be concerned about that Russian threat?