Well, they were not screaming at her as is usual.
The main point of the title is, I think that they could not refute anything she was saying.
But I agree with you - they were not totally speechless.
This is the heart-warming clickbait moment that we purport to be news – and it will leave you speechless:
https://www.walesoncraic.com/heart-warming-clickbait-moment-purport-news-will-leave-speechless/