From the piece linked above, by Benjamin Witte, who previously vouched for Kavanaugh's character.
It demonstrates Kav shows very different faces to different people.
I Know Brett Kavanaugh, but I Wouldn’t Confirm Him
www.theatlantic.com/ideas/archive/2018/10/why-i-wouldnt-confirm-brett-kavanaugh/571936/
The Brett Kavanaugh who showed up to Thursday’s hearing is a man I have never met, whom I have never even caught a glimpse of in 20 years of knowing the person who showed up to the first hearing. I dealt with Kavanaugh during the Starr investigation, which I covered for the Washington Post editorial page and about which I wrote a book. I dealt with him when he was in the White House counsel’s office and working on judicial nominations and post–September 11 legal matters. Since his confirmation to the D.C. Circuit, he has been a significant voice on a raft of issues I work on. In all of our interactions, he has been a consummate professional. The allegations against him shocked me very deeply, but not quite so deeply as did his presentation. It was not just an angry and aggressive version of the person I have known. It seemed like a different person altogether.