Cults and new religious movements often blur the lines between faith and fanaticism, leading to dangerous consequences. Charismatic leaders exploit followers’ vulnerabilities, leading to manipulation, abuse, and even murder. Historical events like the Jonestown massacre and the Manson Family murders highlight the lethal potential of these groups. Recent trials, such as NXIVM, reveal ongoing threats, as cults masquerade as legitimate religions. Movements like Scientology and Mormonism show how some groups evolve, gaining societal acceptance despite controversial practices. Understanding the impact of these fringe groups is crucial in recognizing and preventing their harmful influence.