Christians mostly. Their book says the world can't end unless the Jews control the holy land. They can't enter heaven until the rapture, which happens at the end. No one wants to chill in the dirt for a millenia or two until they go to the good place so they do everything they can to hasten the end days and get to heaven sooner. But they're doing it for everyone, so it's totally not selfish. This is also why they can't leave uncontacted tribes alone, the rapture can't happen until every living soul has been offered salvation through christ, whether they accept it or not. Everyone knowing about Jesus divinity and jews in israel are two of the checklist items to end the game and be judged.
So that's pretty much it, Christians support Israel because they literally want to end the world.
I can't read the Washington Post one. It's paywalled. But I see you're referring to Zionists.
Matthew 21:43 disagrees with that.
As well as Matthew 23: 37, 38 - "37. Jerusalem, Jerusalem, the killer of the prophets and stoner of those sent to her... 38 Look! Your house is abandoned to you."
Ancient Israel were the chosen people. But that was lost after they killed Jesus.
But some can still attain God's favour:
Romans 9:27 - "Moreover, Isaiah cries out concerning Israel: “Although the number of the sons of Israel may be as the sand of the sea, only the remnant will be saved."
And Israel being the chosen people forever wouldn't be fair to everyone else. And that was never the intention:
Hebrews 8:6 - "But now Jesus has obtained a more excellent ministry because he is also the mediator of a correspondingly better covenant, which has been legally established on better promises."
The "better promises" is that "all men of all nations" could become one of God's people, not just Israelites/Jews.
I'm not trying to argue the validity of the Bible here, only pointing out that the Bible itself does not support any nation, after Jesus, to be God's chosen people.