Arguably blackpilled folks are less problematic than incels since they have given up looking and perhaps developed a better attitude toward women (paradoxically) while incels hold a shred of toxic hope that their tradwife will swoop in and save them and that hope eats them alive. Note: I am not a scholar of either community’s worldview
It’s got a long history and really began in earnest under the W Bush administration. A lot of govt money started flowing toward religious schools and organizations around this time under the guise of traditional religious culture being a bulwark against terrorism and a source of right-thinking soldiers for the war.