Why do Jews set a place/open the door for Elijah at the Passover seder?

:smiley:

Including Jackie Mason ??

I feel for your father.

Who said he would do that?

Well, there will be world peace (weapons of war will be destroyed: Ezekiel 39:9), the Temple will be rebuilt (Ezekiel 40), and God’s House shall be called a house of prayer for all nations (Isaiah 56:3-7) which I think implies that.