In Joel we see that Israel is the heritage of God, and much attention is given in scripture to Jerusalem so what is the significance of Beth-El?
Joel 3:2
I will also gather all nations, and will bring them down into the valley of Jehoshaphat, and will plead with them there for my people and for my heritage Israel, whom they have scattered among the nations, and parted my land.
Genesis 28
16 And Jacob awaked out of his sleep, and he said, Surely the Lord is in this place; and I knew it not.
17 And he was afraid, and said, How dreadful is this place! this is none other but the house of God, and this is the gate of heaven.
18 And Jacob rose up early in the morning, and took the stone that he had put for his pillows, and set it up for a pillar, and poured oil upon the top of it.
19 And he called the name of that place Bethel: but the name of that city was called Luz at the first.
[bethel - house of God]
Zechariah 14
1 Behold, the day of the Lord cometh, and thy spoil shall be divided in the midst of thee.
2 For I will gather all nations against Jerusalem to battle; and the city shall be taken, and the houses rifled, and the women ravished; and half of the city shall go forth into captivity, and the residue of the people shall not be cut off from the city.
3 Then shall the Lord go forth, and fight against those nations, as when he fought in the day of battle.
4 And his feet shall stand in that day upon the mount of Olives, which is before Jerusalem on the east, and the mount of Olives shall cleave in the midst thereof toward the east and toward the west, and there shall be a very great valley; and half of the mountain shall remove toward the north, and half of it toward the south.