The Bible has things to say about such
You refer to how the Israelites were to deal with the Canaanites?
Because that is the frame of reference I am using. It appears to be the only “reason” the sons of Hagar seem to understand.
Or are you following some soft-headed interpretation of the “Message of Peace”?
You see, the folks we are dealing with are a lot like a mule: they can do useful things, but you often need to smack them upside the head with a big stick to get their attention.
Peaceful co-existence can occur, but we have to get their attention first, and let them know just how serious we are about being left alone.