It used to be the other way around. Now far-right "populism" is the new counter-culture. Instead of George Carlin we have Milo and Joe Rogan. Instead of Charles Koch it's "George Soros secretly funded this". I remember when I first discovered 4chan back in 2007 it was mostly a left wing atheist pro-Occupy movement site. Now it's full of Warhammer memes and (somehow) became fundamentalist Christian. The inbreds at Stormfront hijacked the shit out of it. But to answer your question I think it's because right-wing 'people' think reality doesn't reaffirm their views because the media is biased, not Fox News though, so naturally everything else is one large well-orchestrated conspiracy to discredit them.

To answer the question, that's simple: A lot of them are evidence-based, logically consistent, have historical precedent, and are based on the fundamentally correct notion that the people in power should not be trusted. That is not to say that they are all correct, or even that a significant percent are correct. Merely that questioning authority is always a wise move. Question that too, question everything.

Because as long as there has been an upper class of people in power, there have been conspiracies. You can literally read through a list of declassified conspiracies from credible sources. Operation Condor, MK-ULTRA, COINTELPRO. Most countries literally have a federal agency that's entire function is conspiracies.

Reevaluate your assumptions, take the time to go through what you believe and why. I do not deem "that seems true" to be sufficient. To me, theories have evidence. Better evidence than "planes make funny clouds" or "Of course ten foot tall reptiles wearing rubber human suits have infiltrated the upper crust of human society, have you seen Mark Zuckerberg?"

Hm, if that is a true observation, it might be out of a deep mistrust into the existing "leadership" which is making use of a more or less balanced approach to decision making, while right-wingers have a very strong preference for autocratic leadership that does not take into account other views. Not visibly. They think that "orders" is a better way to provide working solutions to problems than a give and take mode. In their view to provide a balanced answer needs deception of the public since they feel that it isn't possible to find a balance at all, so to let things appear as balanced it must be a fabricated lie. They only understand a simple yes or no message, there is no intermediate grey solution to them, they reject that as a lie or as a "weak" response or both.