Just over 150: http://www.utlm.org/onlinebooks/bancroftshistoryofutah_chapter19.htm
http://en.wikipedia.org/wiki/Mormonism_and_violence#List_of_Mormon_wars_and_massacres (much edited by Mormons)
And unlike the early church, Rome also has their inexcusable religious violence, as did early Protestantism which had much to unlearn from her. But when men exalt their own church over the Scriptures then the bodies as well as the souls of good men and women are in peril.