@CallMeKate and
@OldOld need to buy the computer game, Civilization VI, and then tell me whether they enjoy killing millions IN THE GAME or not.
I send my forces into foreign cities and then massacre the inhabitants. I always play Germany in the game since they have the best attributes for mass killing. I once played the USA in the game and was absolutely bored.
If you have not tried Civilization VI, then you cannot contest my judgement. At age 90 I spend most of my waking hours in that game.
Near the end of a game, which takes many months to complete, research eventually yields the production of nuclear bombs. One can even get to build hydrogen bombs for even more damage. Space ships are also available for production near the end of the game after many months playing it. When one sends jet bombers with nukes to bomb enemy cities, one can even imagine the screams of the little people as the mushroom clouds expand over the enemy cities!
The most fun is sending "Modern Armor," the best of the available tanks to crush opponents.
I also enjoy reading Audible eBooks about WW 2. The mass killings of WW 2 are described in detail. The most interesting part is about Nazi Germany invading the Soviet Union and read about how Hitler and Stalin massacred millions. Then I go to the game and play it out on my computer! My favorite Audible eBook is "Bloodlands." It describes how Hitler and Stalin killed millions and millions!