WERE JOSEPH SMITH and brigham young false prophets and liars?

who have deceived many with mormon belief stystem, which goes agaoinst teachings of what jesus himself was about? the mormon church is worth over 30 billion dollars and why are they so secretive about finances? is it also tru that the morman church only renounced polygamy to be approved of joining the united states,and use separation of church and state to make the church a business empire?