First: Americans, we don't want to nuke you. We want Microsoft and Apple to work. We need our
Western partners alive.
Second: about "killing millions" - the modern concept of nuclear attack is not about this. The age of
Tsar Bombs is over, modern nukes are very accurate (so no excessive power is needed) and ecologically clean - no unnecessary air pollution, no "nuclear winter". The targets are the strategic objects - ICBM positions, power stations, fuel plants and other infrastucture objects that would get the country paralysed if they are destroyed, and they would be hit with high precision. But the "total annihilation" doctrine is >40 years outdated.
Third: if the Bears really headed for attack, they wouldn't have to enter the US airspace to hit the targets on the west coast - the Kh-55 missile carried by Tu-95MS has 2500 km range.
And fourth: even pilots of these "apocalypse machines" can have sense of humour.
Although it's not known exactly if the greeting was an order or the pilots' own idea.