Satan was super popular in the 70's and this here is another example of the fear of Satan creeping into your life. In this one a hooded Satanist cult perform human sacrifices in caves by spiking people or burning them alive. These parts are pretty exciting, unfortunately there's a whole bunch of other parts in between this where we just have people hanging out in the desert and not much of anything interesting happens. Maybe if this wasn't a PG-rated horror flick it woulda been more memorable. I did like how things are wrapped up at the end and completely undersold as the sheriff just refers to the mass of human-butchery as a bunch of foolishness. I'd say watch the 1975 William Shatner/Ernest Borgnine classic THE DEVIL'S RAIN instead of this for a better time with a Satany group of weirdos. AKA DISCIPLES OF DEATH(this is also the name of the cult)
Addendum 6/19/18:
Upon a recent theatrical showing I enjoyed this film a lot more and the character of the stereotypically Mexican handyman Paco really grew on me. For what was obviously a super low-budget affair I think director Frank Q. Dobbs did a commendable job.
Five minute teaser!:
Apparently this played in Texas on a double-bill with another really obscure horror(or is it a western?) flick: