The production team made the decision to put a sound effect, of glass smashing, over the word Palestine. You can listen to the whole performance here, or the offending section here.

In response to the original complaints, the BBC executive argued (pdf)

that BBC Radio 1Xtra and the BBC as a whole had a duty to be impartial. In this instance, the production team felt that Mic Righteous was expressing a political viewpoint which, if it had been aired in isolation, would have compromised impartiality.