I am sorry, but a verbal prayer to an imageless deity is a very specific kind of prayer and is not a common type of prayer beyond the Abrahamic circles. So what you are saying in effect is that you wish impose the type of prayer that you have in your religious group upon everyone by calling it universal by fiat. That is not acceptance of each others religions....not by a long shot.Well no one should be compelled to worship the way another religion worships. But in interfaith all these faiths do come together and pray. They probably have a common verbal prayer which each say from their respective religion but say their diverse special forms of prayer in their own communities.
To accept each others religion, the people should have common worship building where one day everyone prays like the tradition X and ten on another day everyone prays like tradition Y and so on....be it through ceremonies in front of idols, or through namaz, or through Christian mass, or through pagan or vodun rituals, or through meditation and yoga. Actively practice and participate on every path at least say once a month and immerse in that spiritual world fully when doing so. Then discuss and understand the teachings with practicing masters of those paths without prejudice or pre-conceptions. If every community everywhere in the world has, in their locality one such inter-spiritual house with full communal partcipation, then yes...I believe true progress and mutual understanding is possible. The bahai way is just another sectarian way, same old same old. That is not the solution.