Japanese Giant Hornets have no moral values. Genocide is their friend.

Natural selection makes this stuff possible. In nature there are thousands of examples of how natural selection works.

"Nothing in biology makes sense except in the light of evolution."

These are the introduced European honeybees which have not evolved to defend themselves. If a Japanese Giant Hornet discovers their nest that hornet sends a message to the other hornets: It's dinner time.

"30 Japanese Giant Hornets kill 30,000 Honey Bees."

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This is payback. A Japanese Giant Hornet discovers Japanese Bees. These bees have evolved to be able to kill the hornet, but they must do this before the other hornets get the message they are there.

"Japanese Giant Hornet Cooked Alive By Bees."

One more thing. There is much more information about Japanese Giant Hornets in Why Evolution Is True by Jerry Coyne, Chapter 5 - The Engine of Evolution.