I prefer the term "totalitarian" when describing the aims and means of the Radical Left in this country. Their objective is uniformity of thoughts, speech and actions though active suppression of any dissent. This inevitably leads to dictatorship, with or without the intermediary of private ownership.
This much I'll grant you.
A good many young and passionate extreme liberals FAIL at the very basics of BEING liberal. In fact, the very signal that they are failing is when you see them loose their "inner fascist".
Examples include heated demands for "safe spaces" on university campuses.
Good Lord, a university campus is the very LAST place on Earth that should offer "safe spaces" for ideology.
So yes, it is indeed very very difficult to be a liberal, and the more extreme one's liberal ideology, the more difficult it is to preserve it without resorting to the failure of fascism.
The Right, however, makes good use of this as ammunition for their agitprop fodder, because they cannot resist the urge to categorize ALL liberals in this manner.
Much of this is projection however, because when one scratches the surface of a good many members of today's Right, one finds a checkered past as a failed liberal.
Most of the Reagan era neoconservative Right started out in their youth as extreme left liberals, and failing that, assumed that they had learned all they needed to know about liberalism, and they define liberalism in those narrow terms.