He prepared right quick, mid-talk, and gave them exactly what they deserved.
His full remarks: http://www.youtube.com/watch?v=x2ZVihACwQ0
Incidentally, based on the mix of applause and heckling, it appeared the crowd was less than unanimously anti-Cruz. However, there were definitely some "Christian" sand nazis there.
There’s no reason to think that there were not Muslims in attendance at this meeting. The hecklers could easily have been CAIR members or Middle East Christians, so make no assumptions.