Aaron,
The biblical expression "the portion of Jacob," being not clear to the modern reader, has moved some Bible versions to simplify it. The allusion is to the God of Jacob in contrast to vain idols of the nations. It is used as a descriptive title for God Almighty. This is no reference of Jesus Christ. The verse itself ends with this: "Jehovah of Armies is his name." Below a sample of other versions concurring with this conclusion:
NEB: God, Jacob’s creator, is not like these...
GNT: The God of Jacob is not like them...
ERV: But Jacob’s God is not like the idols.
GW: Jacob’s God isn’t like them.
ICB: But God, who is Jacob’s Portion...
LB: But the God of Jacob is not like these foolish idols.
NCV: But God, who is Jacob’s Portion...
NRSV: Not like these is the Lord, the portion of Jacob...
VOICE: The portion of Jacob, the Eternal One...
NIRV: The God of Jacob is not like them.