Kiss became involved in peace activities from a young age. Later, traumatized by his three years in Israel's mandatory military service, Kiss began spraying pro-peace and anti-war catchphrases. These catchphrases were often sprayed in Hebrew and Arabic. However, Kiss felt construed and limited by mere words, and wished to express his yearning for peace in a non-verbal and visual way.

Kiss thought extensively and sketched hundreds of images trying to depict peace in the Middle East and an end to the Arab–Israeli conflict. His sketches included as various elements as the peace symbol, dove and olive branch, broken rifles, a wolf living with a lamb, visual rearrangements of the word "peace" in Arabic ("salaam") and in Hebrew ("shalom").

Kiss wished to paint the mural both in the Palestinian territories as well as within Israel, for the message of peace needed to be directed at both sides of the conflict.

https://en.wikipedia.org/wiki/The_Peace_Kids_(mural)