The account you're arguing with runs a disinfo community where he posts fake articles with no disclaimers, and then engages seriously in the comments with the people he dupes as if the articles were real, and never mentions that they are indeed fake.

Until someone calls him out on it, and then he gets all self-righteous and compares himself to the onion, and acts like the people calling out his bullshit are defending the people and organisations he's spreading disinfo about.

Like, someone can hate walmart and still be against disinfo. There's plenty of legitimate criticisms to make; making up bullshit and spreading disinfo is not the way.

I wouldn't take him seriously. I'd even say he likely doesn't have any affiliation with Ralph Nader. Maybe he's secretly trying to make Ralph Nader look bad by being a dick on the internet in his name...