"For although there may be so-called gods in heaven or on earth--as indeed there are many 'gods' and many 'lords'-- yet for us there is one God, the Father, from whom are all things and for whom we exist, and one Lord, Jesus Christ, through whom are all things and through whom we exist." (1Co 8.5-6 ESV)
Does it really matter what god or gods we believe in? Does it matter, ultimately, because the whole of humanity will come out okay in the end? It's been said, "All roads lead to Rome"; do all roads lead to God?
According to John Wesley, not all roads do. Reflect on his view from his Sermons, # 114, "The Unity of the Divine Being":
"And as there is one God, so there is one religion and one happiness for all men. God never intended there should be any more; and it is not possible there should. Indeed, in another sense, as the Apostle observes, 'there are gods many, and lords many.' All the heathen nations had their gods; and many, whole shoals of them. And generally, the more polished they were, the more gods they heaped up to themselves. But to us, to all that are favoured with the Christian Revelation, 'there is but one God;' who declares himself, 'Is there any God besides me? There is none; I know not any.'"
Notice his phrase, "...to all that are favoured with the Christian Revelation". A revelation is an unveiling, a communication from God to man, something that can't be discerned by reason. For there to be a revelation, by definition, God must tell us what it is or we wouldn't know it and couldn't guess at it.
If true Christian Revelation exists then all other such "revelations" of different religions are wrong. Either God revealed it or he didn't.
I suppose you can tell that I love the shades of white and black!