She may not have lied, but the accusation is, based on the majority of the evidence, false. It is possible she is mistaken about the identity of the person who assaulted her. That’s certainly far more likely than Kavanaugh assaulting someone he appears never to have met, at a party that appears never to have happened.
To continue to believe that Kavanaugh assaulted Ford, you have to ignore every single piece of evidence apart from Ford’s testimony. When that evidence includes testimony from people who Ford claimed would support her, that doesn’t seem to be a logical position to take.