It's fair to say that not all theocratic systems are fascist, but they're also not mutually exclusive. A particular theocratic system can also be fascist in nature.

Some common points:

• Appeal to tradition
• Rejection of modernism
• Anti-intellectualism
• Absolute factual authority of leaders
• Obsession with outgroups as enemies, such as sinners and atheists and believers of other faiths
• Special jargon to control the masses
• Subordination of people to a greater cause
• Jingoist militarism (ironic for a lot of "peaceful" religions)