Wyeast and Klickitat grew jealous of each other and soon began to quarrel. They became so angry that they fought. Their people also took up the quarrel, so that there was much fighting on both sides of the river. Many warriors were killed. This time the Great Spirit was made angry by the wickedness of the people. He broke down the Bridge of the Gods, the sign of peace between the two tribes, and its rocks fell into the river. He changed the two chiefs into mountains. Some say that they continued to quarrel over Loo-wit even after they were mountain peaks. They caused sheets of flame to burst forth, and they hurled hot rocks at each other. Not thrown far enough, many fell into the river and blocked it. That is why the Columbia is very narrow and the water very swift at The Dalles.

–"The Bridge of the Gods,"

Ella E. Clark

According to this legend, why did the Great Spirit take down the Bridge of the Gods?

to punish the Plateau