Why is it mocking Ford to repeat/paraphrase her words?

She does not know any details. How is it mocking her to point that out? Where were you? "I don't know". When? "I don't know"…

If those word are so offensive, why were they used? Why is it so offensive to point to her own testimony?

Because her testimony was a joke.

Why? Because the left doesn't like it when their tactics are exercised against them. Donald Trump acts just like they do.

She SHOULD be mocked

for example, looks like she's been beat with the ugly stick

She was paid to lie

Sure, sure… And Trump never mocked that disabled reporter either, right?

Quoting Ford is not mocking but rather repeating what was actually said.
Dems shouldn't get upset with that.

Mocking includes sarcasm, making jokes, demeaning the person, adding words and actions to their testimony so it gives a bad impression. It would not be mocking if he just said what she said in a polite way, as a statement of fact. But adding in facial expressions, exaggerated body language, taunting and teasing is typical of mockers. They want you to think the worst of the person they are mocking.

That's actually how you mock someone. You repeat their words in a mocking way. It's literally one of the only ways to mock someone that there's.