Bolton was a Director of the Project for a New American Century (PNAC,) the group of Neo-conservative morons that ran US foreign and military policy during the Bush administration and created the conditions that pretty much dictated US foreign and military policy during the Obama administration.  A "ground changing" (sic) war with Iran was a center piece of PNAC's strategy so it's no surprise Bolton is working to start a war with Iran.  

She believed in nothing; only her skepticism kept her from being an atheist. -- Jean-Paul Sartre