Jews follow many traditions that are human in origin and differ from God's word. The movie "Fiddler on the Roof" memorialized this in song. When asked the reason for their practice, the reason given was not a command in Scripture, but "tradition"!
But in our little village of Anatevka, you might say every one of us is a fiddler on the roof, trying to scratch out a pleasant, simple tune without breaking his neck.
Fiddler on the Roof - Capitol Theatre
“Fiddler on the Roof” is a story about a good man, Tevye, whose traditions are more important to him that the commandment to love and forgive as God loves and forgives. It was a story of a good man whose traditional interpretation of what he thought the Bible said, “Jews are not to marry Gentiles” was ultimately more important to him than the commandment of God for love, mercy and forgiveness. And that was the tragedy of Tevye: to love his traditions more than the commandment of love and mercy for his daughter who did not believe in his traditions the same way that he did.