Funny how there's a bunch of people in the comments essentially just unironically repeating the meme: "Well this must be wrong because I believe this and I'm actually a centrist!!!"
That's the point, buddy. You're the butt of the joke. The idea that the far-left and far-right are equally bad or warrant the same amount of scrutiny and criticism is a right-wing belief.
To make the point more obvious instead of using "left" and "right" look at specific political beliefs that the far-left and far-right have:
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Equality across social and demographic groups vs. State-enforced racism, sexism and other kinds of bigotry
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Abolishment of bourgeois property and money vs. Complete privatization, oligarchy and corruption
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Globalization, peaceful relations and a right to live where you want vs. Complete isolationism and xenophobia
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Right to self-governance and no government with a monopoly on violence vs. State sanctioned violence against those considered undesirable or traitors
Hopefully I don't need to explain which one is obviously worse. To equate what the far-left and the far-right advocate for one must misrepresent the left, so both-sides-ism inherently has a right-wing slant.