I wrote this piece comparing the LDS to fascism some years ago, but it applies equally to religion in general

Both Professor Stuart Hall in 1979 and in 2004 by Dr. Laurence Britt wrote articles defining the major points in identifying extreme nationalism and or fascism, just as a thought experiment I took their criteria adapted and applied it to the LDS

1. An easily identifiable symbol to rally too.
2. Specific terms/ code words or euphemisms exclusive to the group.
3. Powerful and continuing expressions of belonging to a chosen or special race.
4. Praising of a Mythological golden age of your ideology that give rights of rule by dynastic or spiritual heritage to all members and especially to leaders
5. Being included in and party to sacred mysticism denied to less worthy others
6. Physical Body Worship combined with reminders of spiritual unworthiness
7. Disdain for the importance of human rights especially those of outsiders
8. Suppression of the rights of the individual in favour of the group and the greater good
9. Identification of enemies/scapegoats as a unifying cause 
10. The supremacy of the physical and or spiritual power broker
11. Institutionalised sexism 
12. A controlled mass media 
13. Obsession with internal security and or secrecy 
14. Religion and ruling elite tied together 
15. Power of corporations protected 
16. Power of labour suppressed or eliminated 
17. Disdain and suppression of intellectuals and the arts 
18. Obsession with crime and punishment 
19. Rampant cronyism and corruption 
20. A pretence at democracy including Fraudulent elections or sustaining of the leadership 
    If you accept the above as indicative of a fascist state then the LDS is a fascist institution.