Pure communism is not that either.  You are looking at the implementation of communism.  Just as Pure Liberalism is not in and of itself bad, the implementation often is. 

Liberalism, in its true form here in the US, is about the state doing a cradle to grave care taking of the individual.  And in its pure form, so is communism.  The execution of communsim is imperfect since it is done by imperfect souls.  But the philosophy is liberal.

We have had several debates of late about how evil (or good) some of the major religions of the world are.  IN their pure form, they are meant to be good.  But then they are corupted by imperfect people to do evil.  That does not make the core tenets of those religions evil, just the implementation.  But I dont see many people arguing that the inquisition was not done by Catholics because they were not following the core beliefs of their religion.

Not all Liberals are communists is what should be stated.  So while some elements of liberalism do have those elements (I use the example of hate crimes - which is another form of thought control), not all do.  Just as not all Elements of any ism contain the essence of the evil parts.

Each ism contains good, as well as bad. 

I was going to go on, but realize that this is going far afield of your original article, so we will leave it for another thread.  But I will leave it as while liberalism is not evil, it contains factions that are evil (just as conservatism does), and they are capable and have done things in their name that may not fit with their pure goals, but are evil in their actions.