On the Southern Poverty Law Center website, this rather odd statement can be read:

Yesterday, Friday, March 9, we published an article entitled “The multipolar spin: how fascists operationalize left-wing resentment.” After receiving some concerns about the article from Max Blumenthal that evening, we took it down, pending further review.

The article was written by Alexander Reid Ross as a follow-up to earlier articles for SPLC titled “The Internet Research Agency: behind the shadowy network that meddled in the 2016 Elections” and “The far-right influence in pro-Kremlin media and political networks.”  Subsequent to the removal of the latest, the other two have been removed as well.