Parsha Ki Tavo
One of the definite duties Moses gives his people, to be done when they finally will cross the Jordan and enter the Promised Land, is to build an altar. This altar must be built of stone, and sacrifices will be offered on it. Moses details how it should be built. He does not say what tools to use in the construction, but he specifies what not to use. You shall build an altar to the Lord your G-d, an altar of stones; do not raise iron on them. (Deut. 27:5) Use unhewn stones, called shleymot complete not touched by a violent axe. The Talmud explains that the altar promotes peace between Israel and G-d, and the word for peace is shalom from the same root as shleymot, so the unhewn stone symbolizes that peace. But iron is what weapons of violence are made of. Dont mix them.
Contrasted with some other leaders methods to achieve salvation, like Mohammeds sword of the prophet or Torquemadas auto-da-fe, this caution by Moses is remarkable. Carried through the generations and translated into principles, we see it reflected in religious relations. Judaism never practiced forcible conversion. No stories of convert or die. In fact, for most of Jewish history, no missionary activity at all. From time to time, we hear suggestions that maybe we should actively seek new Jews, but we dont. Many seekers come to adopt Judaism and they are welcome, but there is no campaign to attract them and certainly no pressure on them to change their faith. Those who become Jewish do so voluntarily and only voluntarily.
No axe on our altar.