So if I understood you correct, there is only one God and not many? So if someone claims that there are many gods, would they be correct then?
Yes, as a lover of science I can only accept the idea of a non-personal Supreme Consciousness.
I think most Hindu's think in a somewhat similar way.
However, they will often also have a personal form to which they direct their devotion to that Supreme Consciousness (they call that their
Ista Deva)
Religion is mostly mixed with mythology, so the second category I mentioned but also the third will have had all sorts of mythological extra's or modifications added to the personality of the original historical Guru (e.g. Jesus as a sacrificed and resurrected Son of God). The other two categories are obviously completely mythological.
The philosophical "problem" lies perhaps with the idea that a Guru can be seen as personification of God.
I think that even in Sufism the teacher is highly regarded in a similar way.
The personification of God e.g. in the form of Shiva or Krishna or perhaps even Jesus is not the same as Brahman but the devotee will nevertheless treat Him as if He was the Supreme Consciousness because the Guru is spiritually one with God.
This mystic type of respect for the guru and even deceased guru's is I think also found in Shia Islam.
God cannot incarnate in a personal body, it is illogical, but the devotional relationship between Guru and disciple or between Ista Deva and worshipper is not based on logic and reasoning. Same with Christians and Jesus.
And it works spiritually, becoming more like the Guru through a loving relationship (devotion) leads to emancipation of bondages.
The claim that there are multiple gods for me personally is only true for the returning different forms of Taraka Brahma.
But they are only very special representations of the one Brahman to me, they are not God in an absolute sense. It is very hard to have a deep devotional relationship with an abstract absolute God, I'm not sure if that would not be a rather ritualistic mechanical relationship, but I could be mistaken.
Perhaps after reaching higher spiritual states of absorption the love for God loses its personal form in a natural way.
In Tantra-Yoga both ideation on Brahma as well as devotion for the Guru are used as tools for spiritual emancipation.