Here "Israel" probably refers to the northern tribes of Israel. The people are members of those tribes. They came to Jerusalem, which is in Judah. Alternate translation: "all the people who came together from Israel in the north" (See: [[rc://en/ta/man/translate/figs-explicit]])
Here "the land of Israel" probably refers to the land owned by the northern tribes of Israel. Alternate translation: "the foreigners who came from the land of Israel in the north" (See: [[rc://en/ta/man/translate/figs-explicit]])