You are correct Evidence mainstream Christians believe that there is just one God and consider their beliefs to be monotheistic.I personally did not believe as they did because there are so many scriptures where the deities ars spoken of separately.Even Jesus stated once that he did not know the day nor the hour when the end will come that that was only known by the father.
There is nothing people will not maintain when they are slaves to superstition
http://chatpilot-godisamyth.blogspot.com/
http://chatpilot-godisamyth.blogspot.com/