Thanks to Ezra Klein, here's some video of David Brooks' mature, serious candidate singing a little ditty about bombing Iran:
I would also note that the questioner's premise -- that Iran is "blowing up people" -- is factually mistaken. A mature, responsible politician would have pointed that out. McCain, however, is a different sort of politician. Isaac Chotiner remarks, "If you think McCain is old and crazy now, just wait until his second term!"