The Torah, in DT 4:1-2, says to live according to God's laws, not adding to them nor removing from them. In Judaism, many traditions have been developed that seem to have become laws that override the Torah. For example, the written law of God says to let the farmland be fallow for every seventh year. Tradition provides a way around the law by allowing people to sell their land for one year to a non-Jew, enabling the farmer to claim, 'I did not farm MY land, so it is OK.' If the land belongs to God, that farmer would still responsible for not having let God's land rest. In fact, according to 2 Chronicles 36:21, because Israel did not keep the shmitah year for 490 years (70 shmitah years), the exile to Babylon was likewise 70 years, to give the land the rest it had been denied by the religious leaders of those days. The same is done during Pessah, selling the Hametz. so you can say, "It's not MY Hametz in my house". These manipulations must be disgusting to God who said not to do them!