In the 1960s, with Time declaring God Is Dead, we saw the rise of $cientology, the Manson Family (Manson even had an e-meter at his ranch), the “Church of Satan(TM)” (actually an atheist cult/coven/orgy club), and Jim Jones’ Democrat Liberal “People’s Temple”. Also militant sects like SDS/Weather Underground, Black Panthers, Nation of Islam, etc.
What filled the void in peoples’ lives was worse than what they claimed was so bad that it had to be replaced.
Yes nature abhors a vacuum and will fill it with whatever comes!