Why are humans so violent to each other?

When caterpillars descend on a tomato plant and start eating their leaves, the tomato has a satanic way of defending itself.

"The tomato plant will inject something into its leaves that makes the caterpillars look up from their chewing and turn to eye their fellow caterpillars. Soon, the leaf becomes irrelevant. The caterpillars begin to eat each other."

- Zoe Schlanger, "The Light Eaters", HarperCollins, 2024, p. 106.

Have the world's trees being relentlessly chopped down throughout human history evolved a similar strategy to defend themselves? Could they be emitting compounds into the air that make people more suspicious and less tolerant of each other, so they turn from housing each other in the skeletons of trees to fighting among themselves and slaughtering each other in gunfights, mass killings and wars?