Was I trying to prove the point that business leaders are definitely psychopaths, or the point that there is a lot of research on the topic?

You just dumped a popular-level article from a psychology magazine with a wall of references. Whatever you were trying to do, it fails to do either of those.

Have you noticed him handwavey the opposing arguments are?

Taking that as "how", not "him", I haven't seen opposing arguments, just a pointing out that the argument for is not well sustained by the sources.

ETA: This is indeed handwaving.