I am, and have always been, Jewish, but I was raised in a household with a father who was secularly Christian. We “celebrated” Christmas and Easter, but never went to church. We put up a tree but did not speak of Jesus. We colored eggs but did not discuss resurrections.
In Parashat Emor, the Torah reports that a man born of mixed Israelite-Egyptian descent “blasphemed the Name [of God],” was placed on trial, and was stoned to death. A law was then enacted that anyone, Jewish or gentile, who blasphemes the name of God shall be put to death. Over time, in communities throughout the world, laws against blasphemy were put in place to address curses leveled at God as well as perceived slights against some religions.