If the alleged distinction between progressivism and communism can’t be articulated in a single sentence, then there is no real distinction.
And I’m talking about distinction in ideological content, not names of people.
Keep in mind, if you fall for an attempt to create many groups out of one, you’re making it more difficult to target the one group.
In other words, to pretend there’s a difference between progressives and progressives is to serve their interest.