If I were a conspiracy theorist I would think that far right groups like PragerU purposely steal left wing talking points in order to further delegitimize them

I think they like Owning Liberals, and one classic means of Owning A Lib is to point at a liberal politician and say "They're playing you for fools!"

it makes liberals think we’re extremist and further confuses the narrative that there are more viewpoints than just blue neolibs and red neolibs

I think you're trying to get too deep on this and forgetting that conservatives stand for whatever liberals don't like, updated daily. They're going to say crazy shit because they're an organization run by terminally online internet trolls. And some of that shit is going to sound leftist, simply because they're throwing things at the wall to see what gets a rise out of people.