What do you mean? The article just points out that the show’s demographic may somewhat overlap with, for example, Rogan’s demographic:

The show’s core demographic—predominantly men aged 18 to 49—overlaps meaningfully with the audiences of figures like Joe Rogan and, to a lesser extent, Andrew Tate.

They are not saying that Rogan listeners also watch South Park, or that South Park is republican. The article is just pointing out that this demographic of men aged between 18 and 49 overlaps with “Joe Rogan[’s] and, to a lesser extent, Andrew Tate[’s demographic].”

They even frame this as a potential advantage, saying that

South Park holds a rare cultural position in that it can potentially speak directly to groups adjacent to the MAGA movement without preaching, pandering, or being immediately dismissed [emphasis added].

I don’t know about you, but it didn’t feel like it was calling South Park fans like us Joe Rogan listeners. It felt more like the article was pointing out that some, maybe even a majority, of fans could also be Rogan fans, which would make the audiences that South Park reaches with this anti-Trump episode especially influential.

Idk; I certainly didn’t feel offended or anything like that, but I might be misunderstanding you here.