Them and Nicola are both guilty - Jedward are not saints either, they know how to push buttons.
I don't like the way he spoke to Nicola, but the Calum bit
The problem with Jedward is that they can be really nice at times but they're entitled to be rude and provoking because they are "Jedward". John went out of character and that makes you question their behavior in the house. This is the first and only time that we saw any of them without the Jed-charade.