While support for Vladimir V. Putin’s threats resounded in pro-war venues, some Russians reacted with worry, gallows humor and apathy to the suggestions of striking the West and using nuclear weapons.

President Vladimir Putin said on Friday that Russia would keep testing its new Oreshnik hypersonic missile in combat and had a stock ready for use, while Ukraine said it was already at work to develop air systems to counter the weapon.

The new ballistic missile fired by Russia struck a military-industrial facility in the central Ukrainian city of Dnipro, but its real mission was delivering a deadly new message to NATO.