also, this goes deeper.

what is the foundation stone of the world?
it is the Shatya stone upon the temple mount.
so Jerusalem is the foundation/corner stone of the world.

which about her it is said, *paraphrasing* "I shall put Jerusalem a burdensome STONE to all the people round about"
again... the nations want to take something which is not theirs.

but to end with a more peaceful message, Moses struck the rock/stone and water came gushing out, in Ezekiel it is said, water would flow from beneath the third temple, but... there is no water but Torah, so it is written, out of Zion shall Torah go forth, and the word of Hashem from Jerusalem.