Yes, and did you get a chance to see how he misquoted it? It did not say man would become a God, it said man would become God. No definite article, until DelphiUser neatly added it. It's talking about theosis, the perfect union between God and the blessed saints in heaven.
There are no other Gods besides YVWH, the God of Israel. Jesus is not "a God" or "another God", he is God, just as the Father and the Holy Spirit are not "gods" or "other gods," they're just God.
Isaiah 43 and 44 make it crystal clear that there is only one God, and you can't say that "plain and precious parts" were removed from Isaiah, because we have the complete text of Isaiah from the Dead Sea scrolls, and it says the same thing -- and the LDS church admits this!
If you learn a little philosophy, you'll discover that the definition of "divinity" precludes the idea of more than one god just as much as it precludes the idea of a man turning into a god. Google on St. Thomas Aquinas proof of the existence of God, and the concept of necessary and contingent existence.