The article is flawed by politicizing it. McVeigh was every bit as revolutionary and radical as Antifa, or the Weathermen for that matter. He wasn't a Conservative Republican, and was roundly rejected by both parties. OTOH, Antifa is called a myth by Nadler as he quietly urges on their violence.
McVeigh was anti-government, and OKC was payback for Waco & Weaver.
I wouldn’t classify that as right, or left, wing.