Saw this vid and could only applaud it. I see a lot of people who love to apply this "you've only been brainwashed" argument - particularly when it comes to belief systems or points of view that they dislike and/or hold in contempt. It has been my experience that people who make such arguments are only seeking to engage in their own form of brainwashing by applying peer pressure.
Regardless, this young chap has a good head on his shoulders and translated his response quite properly into free verse. Good on him. As he would say, when your parents teach you good values it isn't brainwashing - it's teaching. From the way society is devolving into Culture Rot these days, we could do with a lot more "teaching" and a lot less of whatever crap the guy who accused him of being "brainwashed' had crammed in his head.