Why do religious people say that God is not a ghost?
In the Bible it says that the dead are in an eternal sleep until the second coming of Christ. If this is so then what we percieve as ghost are not the people we know but something very bad using that form. It will decieve and make us believe many things so we can believe that ghosts exsists but it's not true.
God is what Christian believe as our creator and the begining of all. Why do we believe this, out of FAITH. We can not prove it or show it but God is living God is everywhere. Faith is believing, and in order to believe you must have knowledge and that knowledge you can get it from the Bible. Read the Bilbe and if you believe then you'll answer your question.