It may postpone the problem, or even eliminate the problem, but it NEVER solves the problem.

If the problem is how to get group A and group B to live together and share, when group A just kills all of group B, they haven't solved the problem, they've just eliminated it. Should more group B type people show up, the problem arises again.

It's comparable to trying to solve your math homework by burning the assignment and getting the teacher fired. You no longer have to do the howework, but you didn't solve it.