It actually dates back to the 1970s, it has roots in white supremacy! The Christian Identity movement pastor William Potter Gale was the creator of the Posse Comitatus, which was a far right anti-government movement who of course believed taxes were a creation of the Jews to exert world dominance. It expanded in the 1980s with the farm crisis and began popping up in various anti-government groups, an Oklahoma City bombing perpetrator claimed to be a sovcit. Throughout the 1990s it began to attract black people from the Moorish Science Temple (which is also trippy to read about), and many of its adherents today are black. Thanks to the internet it has spread into many other countries, and thanks to movements like Qanon it has grown more.

Here’s a good video on them