BTW, I would qualify the view of Hinduism as a polytheism by saying that all its gods are technically merely expressions of Brahman, who is the One Source of all.
I could say you are an expression of Brahman, and that you are a God. Your expression is your ability to create and thus you express what Brahman does (create). What you create is subject to observation etc, but your ability is the expression, and divine.
Brahman is often discribed as God in his pure and Unmanifest state. The saying, "I am Atman. The Atman is Brahman," reflects the view expressed in the Upanishads that every individual bears the spark of Divinity, and that is seen as the only true Reality.
Self realization- where a person realizes their true self as a creative entity. Jesus realized he was the son of Brahman, he was a God, but not 'God', the ultimate creative expression. That said he was the ultimate creative expression in physical form, the God of men, the ultimate creative expression of man. He was obviously critiqued, but only in light of others non acknowledgement of their own divine spark, thus he was rejected, so to many throughout history that expressed themselves in that manner.
Hinduism accepts the possibility of many Incarnations of Divinity, including Jesus Christ. The Bhagavad-Gita says, "In every age I come back to deliver the holy and destroy the sin of the sinner."
I know a Christian woman who started out in a Vedanta group. She was instructed to choose her Guru, and Jesus Christ was one of the choices. I read a very deep and passionate exposition of Jesus Christ by a Vedantist in a book called, Hinduism and Christianity.
When I was initiated into Kriya Yoga by a Hindu Swami the small group I was amongst were each individually asked who their God was. I was caught off guard and said I didn't know, and he said fine. Most in the group said Jesus. He was getting each to focus on their representation of God in physical reality, their Guru (as best they could) and that they shouldn't detract from that, as that was their spiritual identity. I've come to identify with many Guru's over time, they are not God (the ultimate creative entity/force) but they are reflections of this creative force, and they are examples of what it is to create effectively. Of course we are all creative, thus, we are Gods, but most (including myself at time) are less effective in their expression, and so the realization is less apparent.