This is in our brains. We've evolved over millions of years to become like this.

education / culture issue

Every culture in every corner of the world throughout known history.

So far. Hence, education / culture issue.

There is a particular amount of hubris in your statement that reeks of ignorance. Violence is an innate behavior of all mammals. We can choose to do it less, but it will always be an option. Take people that get brain damage and are otherwise functional but have issues with violence.

The evidence points to an uninterrupted stream of human violence throughout all history. Meanwhile, you speculate --without basis-- that this will be solved via education, positing some pedagogical or cultural breakthrough that somehow has evaded humanity for all of its existence. What do you think that will be?

Shades of the novy sovetsky chelovek.

How well did that work out?