The Pharisees asked Jesus about divorce, and He asked them what Moses said. They declared that Moses permitted a man to write his wife a certificate of divorce and to dismiss her, but Jesus explained why Moses had written that,
“And Jesus answered and said to them, ‘Because of the hardness of your heart he wrote you this precept’” (Mark 10:5).
We may fool ourselves into believing that the Lord approves of something that we are doing, but it might be that He has allowed a situation to go on, because He knows of the hardness of our hearts.
I have heard it said that allowing the Israelites to divorce their wives prevented the men from harming their wives, and that might be the reason for allowing divorce. However, what the Lord wants from us today is to love and to accept one another.