Conversation so far:
What did Nas do at Virginia Tech ?
On September 6, 2007, Nas performed at a free concert for the Virginia Tech student body and faculty, following the school shooting there.
How was Bill O'Reilly involved ?
When announced that Nas was to perform, political commentator Bill O'Reilly and Fox News denounced the concert and called for Nas's removal
Was Nas arrested at Virginia Tech?
Nas was not arrested.
What did Nas do that was controversial ?
An argument erupted in which O'Reilly claimed that it was not only Nas's lyrical content that made him inappropriate for the event, citing the gun conviction on Nas's criminal record.
Was Nas removed from the concert at Virginia Tech?
On September 6, 2007, during his set at A Concert for Virginia Tech, Nas twice referred to Bill O'Reilly as a chump, prompting loud cheers by members of the crowd.

Question: Was Virginia Tech critized for the concert ?
Self-contained rewrite: Was Virginia Tech critized for the concert ?