I believe the critical part of this story is her denial of her use of the word 'unamerican' even though she clearly used the word minutes earlier.
She's a nutjob on the scale of Martha Mitchell.
Saying "Shove it" was funny because she'd just cautioned against practicing incivility in her speech.
She was just as amnesiac about that, as she was about saying "un-American".
What a headcase.