Was Justin Bieber right to hang up on Mojo in the Morning?

It's not cool to talk about anybody's mother like that. I'd be angry too!!

I listen to the radio station that Mojo is the morning host on. I heard this interview when Mojo played in Friday AM. Maybe the Justin Timberlake comment was a compliment & Biebs took it the wrong way but the comment Mojo made about Justin B's mom was totally uncalled for and very unprofessional.