actually you do nt have to prove the many deities or Gods that they really exist, because they really had existed in their times, They are part of the evolutionary process for us humans to transcend to higher consciousness.To simplify the analogy, when we were young
and we are in the lower
grade school, we were taught simple
subjects not advance literatures but simple stories even mythicals, The same with religion, thousands of years ago when there was no science yet, primitive people had a religion, of course man made faiths to conform with their state of mind or intellect.But later atfter thousands of years we evolve into a more educated people
and so new concept of God again was presented to them, another man made concept,
and this go on
and on, until a few thiousand years ago.monotheism, Judaism, christianity, islam, buddhism, etc also evolved, But with the
accelerated evolution, these faith again is threatend with obsolesencs because of of scientific developments
and education.In panthroteistic faith, the future religion needs to conform to evolutionary process, This proves that God is always there guiding the change.
And it his will that made this a reality in history since the begining of the universe 13 billion years ago,
and this will continue to exist until He will completely fulfill His will to infinity, Thats PANTHROTHEISM, the futue, man made religion under His guidance through scientifiic evoluition after the Bi Bang