I guess the closing footnote of the blog post summarizes it well:
from the point of view of many leftists, they’re not very far left, and liberals are, in fact, right wing
Trying to place people as left/right in an international forum like this is a complete waste of time. I’m writing from a Polish instance, where communist symbols are banned and the political left/right dimension looks completely different from my Scandinavian home country. In my traditionally left-leaning home country I’m a leftist. By the minds of many Americans I’m a stupid centrist because I’m not ideologically pure enough - Social Democracy is just capitalism with a human face etc. And don’t get me started on the Russians and the Chinese.
For some people, if you reject Leninism you’re right wing.
Only the purest are good enough for the People’s Front of Judea.