Should NATO members respond militarily when Russia attacks another NATO country?

Context

NATO's founding treaty commits members to collective defense: an attack on one is treated as an attack on all. The question of military response to Russian aggression against NATO members sits at the heart of the alliance's credibility and Europe's security architecture. Recent incidents—including Russian drones striking NATO territory—have intensified debate over whether the alliance should escalate militarily or pursue diplomatic channels, with significant implications for global stability.