They are people who have fallen for and/or are grifting for a deeply unhinged conspiracy theory that national laws don’t apply to them if they do some certain set of pseudo legal things. What exactly those things are, as well as what laws don’t apply to them,vary widely, but are usually centered around driver’s licenses and car registration, tax evasion and not paying child support.

Past that it’s hard to explain what their beliefs are because it is so vague and ever changing.