"We believe in nothing and we're willing to die for it"

There are definitely people out there like that, like channers.

However, they're not really organized. The closest they seem to get is being riled up and mobilized by existing movements like MAGA. It is, ironically, the administration making a fuss about "nihilistic violent extremists" that is actually fomenting violence among them to turn them into a relevant force in the first place.