Leaders have tried to find peaceful solutions like this in the past, and they have failed.
These beings are not interested in peace, at all, nor are they interested in reasoning or being educated. They were created for only one purpose: to try and enslave and ruin the entire world. They have been doing absolutely everything they can to try and achieve this for centuries, no matter what. And at times, they have proven that they are even willing to sacrifice their own to achieve their ends. And whenever they are kicked out, they will just come back in again sooner or later, stronger and in higher numbers than they were before.
We can see right now, that even though they are completely screwed, and most likely know it, they still don't give up. Like a spoiled child who thinks its the center of the whole universe, they will continue to cry and complain and have their little temper tantrums until they get what they want, which they won't.
Everything that is happening to them now, is entirely their own fault.