In the first place these “researches” think that Bernie Sander’s New Deal liberalism is socialism. Secondly, even if you took the term the way the Trump “researchers” use it, China and the Scandinavian countries have a much better track than they indicate. Thirdly, as the author points out, if socialism was such a dead end, why even mention it? It is mentioned because it is a real threat to this administration. The image below shows their complete lack of understanding of either socialism or capitalism.
Image from intellectualtakeout.org