Justin's mother has clearly not taught him respect for Jewish people:http://en.wikipedia.org/wiki/Justin_Bieber
"While searching for videos of a different singer, Scooter Braun, a former marketing executive of So So Def, clicked on one of Bieber's 2007 videos by accident. Impressed, Braun tracked down the theater Bieber was performing in, located Bieber's school, and finally contacted Mallette, who was reluctant because of Braun's Jewish religion; she remembered praying, "God, I gave him to you. You could send me a Christian man, a Christian label!... you don’t want this Jewish kid to be Justin’s man, do you?"
However, after praying with her church elders and receiving their encouragement, she permitted Braun to fly Bieber, then 13, to Atlanta, Georgia, to record demo tapes. A week after arriving, Bieber sang for R&B singer/songwriter Usher."
In light of this, I don't find it shocking that he treated Anne Frank's house with such irreverence.