Arguably, the very founders of the United States were one such group -- a group of men who didn't trust the government and took concrete action in the form of armed revolution against their lawful ruler. It seems to me that "right wing extremism" is baked right into the United States culture and even their constitution since the 2nd amendment was for the purpose of opposing the federal government (see, for example, Madison's comments
Federalist No. 46).
I'm not so sure that I would agree that the founders of the US were distrustful of government per se. That they were revolutionaries is a given. That they sought to overthrow the British monarchy is as well.
Once that was done, however, they were very much challenged in interpreting an enduring system of government which would always be one of the people and which would not be easily co-opted by some form of tyranny. One can almost read elements of communism and definitely libertarianism into their fundamental beliefs. In many ways the structure of their government was one of competing governments which kept checks and balances on each other (with the States having the larger power). It wasn't so much that the 2nd amendment was for the purpose of opposing the federal government as it was to aid the states' governments in keeping the very necessary federal government within its lanes. Remember the key words in Federalist 46 "But were the people to possess
the additional advantages of local governments chosen by themselves, who could collect the national will and direct the national force ...". It's not the armed rabble that has the power, but the people in arms under the authority of their local governments that have the power. Those who espouse the 2nd amendment (including the USSC) gloss over that element.
While the history of the US is one of caution towards their governments and keeping them controlled through frequent elections where the public can express its will, I wouldn't call it one founded by groups of right wing extremists. Right Wing Extremists have very specific and narrow views and while they put their focus on various local governments as if they exist in a vacuum, in reality what they're revolting against is the majority of the electorate who have voted that government into office.
There is a world of difference between patriots who oppose a corrupt government that is oppressing the majority of the population and individuals with perceived grievances against a society in general which isn't conforming to the standards that the individual insists should apply to all. The latter often cloak themselves as patriots, like they attempted at the Capitol, but in reality they stand closer to the anarchists than patriots.
