Mark Fiore explains it well.
Rightardia hopes voters understand if a Republican is elected president, war with Iran is likely.
The Republican candidates with the exception of Ron Paul are susceptible to religious arguments for attacking Iran. The Project for the New American Century (PNAC) is probably already drafting a plan to invade Iran.
If the US were to invade Iran, China and Russia would help the Iranians. We would end up in another stalemate like Afghanistan.