When you don’t kill a weed, it comes back even stronger and might spread to other areas. That’s why you have to kill it at the root, to fully remove it from causing problems for the soil and the things you actually want to grow. In this case, Pastor Bill teaches on God wanted the Israelites to wipe out the wicked people who were living in the land. He had been patient for centuries with these nations, and they continued to go against anything God desired. Sin is like this too, and you need to wipe it out!