[Apologies for the length of this and if it sounds preachy. I'm not intending to do that, to offer a different perspective, which people can take or leave as they will.]
Yeah, a lot of straw men stand in for God in such arguments. In fact, there never was (I would argue) an "old man in the sky" God in any of the world religions. In Christianity, art sometimes portrayed God in that fashion, but it was symbolic. I don't know if anyone truly thinks of God that way even today, but if they do, it's probably a relatively recent phenomenon.
The pure concepts taught by the world religions have two core characteristics: (1) God is fundamentally unknowable, and (2) God is an entity separate from the creation. In a sense, (1) is a consequence from (2), because everything we know is drawn from our experience of the creation. We can't get outside it. In the Baha'i Faith (my religion), God is also regarded as the Creator of all things, but with a bit of depth added: all things continuously emanate from God.
The essential links between God and the creation are the "Manifestations of God," divine Messengers through whom an unknowable God becomes knowable, to the extent possible. They are the founders of the great religions, including Moses, Jesus, Muhammad, Krishna, the Buddha, and (for Baha'is) the Bab and Baha'u'llah, who lived in the 19th century. There were others throughout pre-history, as far back as humanity has existed.
What these Figures "manifest" are the "names and attributes" of God: love, mercy, justice, beauty, grandeur, creative power, and so forth. All these are inherent in our nature (the "image" of God within us). They exist in us as potentials and that can be developed through education and effort. The Baha'i teachings state that our goal is to know and love God, and that the highest station we can attain is the station of the knowledge of our own selves. "He who has known himself has known God."
Not that God is literally "within" us, but that God's "names and attributes" are within us, awaiting development. God in his Essence remains beyond our conception:
"O children of the divine and invisible Essence! Ye shall be hindered from loving Me and souls shall be perturbed as they make mention of Me. For minds cannot grasp Me nor hearts contain Me." [Bahá'u'lláh, The Hidden Words, Arabic 66]
