Beware My Brethren

A 1972 British horror film, "Beware My Brethren" or "The Fiend", is a gruesome tale of religious fanaticism and supernatural power. Led by a sinister minister, a controlling sect called the Brethren has taken control of widow Birdy Wemys, sending her unstable son Kenny into a spiraling descent into madness and murder. As Kenny's mania overpowers him, he embarks on a rampage of carnage and chaos, targeting women who are deemed sinful or promiscuous by his twisted worldview.