Apologies if I misconstrued, but
this certainly doesn't sound like someone interested in a civil conversation. That struck me as someone trying to be inflammatory by asserting opinion as fact and dismissing legitimate concern for Kavanaugh's fitness and the message it sends if he is confirmed.
Anyway, you said Ford "admitted under oath that Feinstein told her she’d keep the letter confidential until right before the vote." I didn't hear "right before the vote" anywhere in the discussion you highlighted.
In fact, she was directly asked what you seem to be alleging immediately after the conversation you cite, and she flatly denied it: