Why did God kill the Amorites (Canaanites)? Give Light

Why did God kill the Amorites (Canaanites)?
Give Light

When opposing the Bible, people will commonly bring up the subject of God commanding Israel to kill the Amorites (a group of the greater Canaanite people). How do we as Christians defend the Bible when it comes to this topic? The evidence is right beneath our feet... literally!