Whilst I agree that focusing mostly on attacking the mainstream left-wing does not disqualify someone from being left themselves, I don't quite agree with your other points.
Just because you call yourself the "Liberalists" doesn't mean anything unless you back it up action or policy, The only thing that is true about the name "Democratic People's Republic of Korea" is that it is in Korea, and like Voltaire once stated, the name "The Holy Roman Empire" was completely false.
Many mainstream Conservatives in the US are making efforts to try and appeal to black Americans and don't see race as an issue at all; see all the MAGA accounts tweeting "the Dems are the real racists". On the flip side, Marx was notoriously anti-black and Jewish and IIRC was pro-African colonialization; I don't think anyone would argue that Marx was a pillar of the right because of his defense of white Europeans.
I don't think that the right is at odds with the first and second waves of Feminism. At the time these movements took place, Feminism was almost certainly against Conservatives and traditionalists, but in a modern context, most right-wing groups, bar hardline traditionalists or the alt-right (even then, it would mostly be just the Wig-nats rather than the Am-nats) would still support the narrative that the Feminism of the past was overall good. In the UK, Marget Thatcher, a woman, is one of the most beloved figures by conservatives.
Finally, Sargon has consistently supported right-wing political efforts. His support of Trump in 2016 doesn't seem to be unusual for a left-winger. Many lefties saw Hillary and Trump as more of a question of "who is worse" rather than who was the better candidate and in some cases, many lefties saw Hillary as just another corporate shill and/or wanted to shit all over the establishment (ala. Bernie Bros) Sargon at first went with this narrative, but he became increasingly less critical of Trump even at a time when right-wingers were having their doubts. Sargon has gone on to support and asked his viewers to vote for Marie Le Pen, Jacob Rees-Mogg, and UKIP, all of which are not only right-wing but are considered by the general populous to be either on the edges of the far-right (UKIP and Rees-Mogg) or full-on far-right. I get that Sargon said that he supported these candidates because they were fighting against the establishment and/or the ess-jay-duba-ews, but he would often support the other right-wing parts of their platforms and he failed to criticize the elements of their platforms that anyone that even leans to the left would have a problem with
I want to clarify that I'm not saying it's good or bad if Sargon is left or right. IMO I think Sargon started out as a leftie during GG but over the years has slowly shifted right to the point where he's at least center-right to moderate right. I also realize that I have written an incredibly autistic essay.