A lot of the motivation for Trump's actions is to do the opposite or reverse whatever Obama did. Because Obama, supported by most of the West, slightly eased the sanctions on Iran in exchange for Iran ceasing their nuclear experimentation, then Trump had to refuse to renew the agreement and therefore incense an already unstable administration even further. This man child is dangerous, his tantrums are putting all of us at risk. The Middle East is and always has been, a very volatile region, with Muslim hating Muslim, human right violations etc., and I fear that this will make things far worse and as others have said, give ideologically driven terrorists reasons to attack all of us, 'us' being seen as representative of Trump.