Did someone just graft a spine onto McCain?

https://www.washingtonpost.com/amphtml/news/the-fix/wp/2017/02/17/john-mccain-just-systematically-dismantled-donald-trumps-entire-worldview/

He's accepted bullying for so long, I was wondering if he secretly agreed with that attacks on him - accusing him of being  weak and a loser.