This may not be a popular response but when did the nazi regime stop? When did China stop with it’s cleansing? America and manifest destiny? I could go on… Humanity needs to realize that we are pretty shitty in general and can’t be trusted when it comes to hatred, entitlement, and tribalism.
The solution is a neutral third party with sufficient power to stop any country’s bullshit through economic and military (actual) peacekeeping… which doesn’t exist nor will it ever.
So the short answer is they will stop when the cleansing is complete.
After the deed is done we as ‘civilized’ nations will lament the tragedy and promise change… until the media cycle washes all those sins down the drain and it will be forgotten until next time.