This is a joke, right?
The author is dead on.
Actually, no. By comparison to the tyranny promulgated by socialists, all other points of the political spectrum are small beans by comparison. Overall deaths caused by "right-wing dictators" are far higher than those caused worldwide by socialism (including communism).
The numbers are something like 130,000,000 from socialist/communist regimes vs. 29,000,000 for all other forms (mostly "right-wing" of despotism. Rudy Rummler has studied this in great depth and has tons of statistics. If you are interested, I''ll try to find my reference link to his info and post it.