Dennis needs to get over his distinction between leftists and liberals.
It’s not true.
In this article it simply detracts.
His point is that socialists/communists/Marxists make a habit of hiding their ideology by co-opting words and redefining them to suit their cause.
Just my opinion, but I don't think it detracts at all.
I used to use the two terms interchangeably, but I have since come to the conclusion that they are not.
I have a very long explanation to describe the difference in detail, but I suspect your patience would be tried reading it, so I will summarize it.
Liberals are somewhat normal people who view things emotionally without taking the time to think them through, and their malformed views on one or two things is acted on by their limited logic to set their views on other things. These are often not bad of ideological people, and they can usually be talked to in some degree. You won't often change their minds, but they aren't like the two categories of Leftists described below.
Leftists are not "somewhat normal people". I divide leftists into two classes of Leftists:
It is interesting and ironic, because if we end up in CWII, the "True Leftists" AND the "True Believers" are the ones our side would have to go to war with. However, when the Left fights, The "True Leftists" will not only go after US (a given) they will also go after their own "True Believers". Their own people who mindlessly supported them will be dragged away to be tortured and murdered by their own ideological brethren, and as they are dragged away, they will be screaming in confusion "Why are you doing this? I am one of you! I supported you!"
All to no avail, of course. The "True Believers" would present just as great a risk to the "True Leftists" as we would, just in a different way.