BETHEL IS ZION & IS THE MOUNTAIN OF THE LORD!
For those who confuse Jeroboam’s Bethel in Samaria with the true Bethel named by Jacob at Zion (or the City of David), see Isaiah 2:2-4 and Micah 4:1-3 (which are identical passages). Here are Verses 2 & 3 from the Wycliffe translation of Isaiah with English modernised...
'And in the last days the mountain of the house of the Lord shall be made ready in the top of hills, and shall be raised above little hills. And all heathen men shall flow to him; and many peoples shall go, and shall say, Come ye, ascend we to the hill of the Lord, and to the house of God of Jacob; and he shall teach us his ways, and we shall go in the paths of him. For why the law shall go out of Zion, and the word of the Lord from Jerusalem.'
Note: 'the HOUSE OF GOD, OF JACOB' or 'the BETHEL of JACOB' is what is clearly stated. Isaiah and Micah mean the place at which Jacob said, 'this is the Beyt-El ('house of God', or Bethel)
Here it is clear that in the minds of the prophets, the ‘Mountain of the Lord’ or 'the' Bethel or Zion are all used to designate the same site.
They cannot possibly be referring to the site well north of Jerusalem which also became
popularly known as Bethel when Jeroboam set up his false 'house' of worship there!