As I said before, he uses a scale to determine it, but, more importantly, he doesn't define "left wing" and "right wing" as you and the authors of this non-peer reviewed study depict it.
If you don't have that fundamental understanding of Altemeyer's research for decades, you're going to miss the point, which is what happened with you and these other non-peer reviewed researchers.
Read his research, then feel free to post a retort.