Deuteronomy teaches that God commands people to love strangers as a reflection of His own love. It gives three reasons why people should love strangers: 1) Because God loves them and provides for them, 2) Because the Israelites were once strangers in Egypt, and 3) To treat strangers fairly and with care, as God does. Loving strangers involves having compassion for their difficulties, identifying with them, and ensuring equal treatment under the law.