They entered and took possession of it. However, they refused to obey you or to follow your teachings. They didn’t do anything you commanded them to do, so you brought all this disaster on them.
Certainly, there is a curse on all who rely on their own efforts because Scripture says, “Whoever doesn’t obey everything that is written in Moses’ Teachings is cursed.”
All of us make a lot of mistakes. If someone doesn’t make any mistakes when he speaks, he would be perfect. He would be able to control everything he does.