Hi.  I appreciate your interest in the diversity of religious expression and the usefulness of terms and persons from one to understand another.  I'm wondering if, contrary to your position, all religions might not be wrong.  I wonder if John Lennon was more like Jesus than we give him credit for.  Religion seems to be opposed to God, and only occasionally becomes a door into God's world.
I also wonder if it's not a western syncronizing tendency to lump religions into one ball, using categories from one to fit elements of others into.  Nirvana is not heaven is not eternal life.  Buddha is not a redeemer in part because Buddhists do not perceive a need for salvation like Christians do.  The relative truth of each approach is debatable, but it's hard to make them work together.
All that said, I do appreciate your caution against tribalism and dominionism.  Thanks.