Capital, clearly. Not a single anti communist has ever read it because they never once refute a single talking point from the actual book. But every anti communist acts like they totally understand what's in the book and some go so far as to lie about having read it. And then you ask them what it says or why they're anti communist and they just make shit up or parrot 1950s Nazi propaganda and pretend like that's what's in Capital or what communism is about.
It annoyed me the first few times it happened to me but now it just makes me laugh. Having a book on your shelf or knowing the title of it is not the same thing as reading it or understanding it
The real lefty nemesis are all the feds who pretend to be leftists until they see any leftist doing any real leftism and then they immediately shove the boot all the way down their gullet