The use of the word liberal as an insult by some on the left was going on long before the American right wing began using it. They are also two different meanings of that word, or at least there are different connotations when a leftwinger employs the term.
Eta: which sounds remarkably similar to some the arguments for the EU as a protector of workers' rights. 'Thank God the EU didn't beat me'
Phil Ochs Love me I'm a liberal:
İ cried when they shot Medgar Evers
Tears ran down my spine
I cried when they shot Mr. Kennedy
As though I'd lost a father of mine
But Malcolm X got what was coming
He got what he asked for this time
So love me, love me, love me, I'm a liberal
I go to civil rights rallies
And I put down the old D.A.R.
I love Harry and Sidney and Sammy
I hope every colored boy becomes a star
But don't talk about revolution
That's going a little bit too far
So love me, love me, love me, I'm a liberal
I cheered when Humphrey was chosen
My faith in the system restored
I'm glad the commies were thrown out
of the A.F.L. C.I.O. board
I love Puerto Ricans and Negros
as long as they don't move next door
So love me, love me, love me, I'm a liberal
The people of old Mississippi
Should all hang their heads in shame
I can't understand how their minds work
What's the matter don't they watch Les Crain?
But if you ask me to bus my children
I hope the cops take down your name
So love me, love me, love me, I'm a liberal
I read New republic and Nation
I've learned to take every view
You know, I've memorized Lerner and Golden
I feel like I'm almost a Jew
But when it comes to times like Korea
There's no one more red, white and blue
So love me, love me, love me, I'm a liberal