God, The Father, is a man? Mormon Church teach? Islam has a different god as well?

“God himself was once as we are now, and is an exalted man…We have imagined and supposed that God was God from all eternity. I will refute that idea, and will take away the veil, so that you may see.” Joseph Smith (1st Prophet,) History of the Church, Vol 6, p 305. Joseph Smith restored the truth – is this a counterfeit gospel, similar to the one Watchtower has? (2 Cor 11:4)