One of the reasons Saddam Hussein and Iran hated the U.S.

From my point of view, the U.S. seen as the "Great Satan" came from Iran's dealings with the U.S. before, during and After the Shah of Iran was deposed around 1979 I believe. When Iran kidnapped

1. Iran hostage crisis - Wikipedia

   en.wikipedia.org/wiki/Iran_hostage_crisis

   The Iran hostage crisis was a diplomatic crisis between Iran and the United States. .... Kraus was injured in the attack, kidnapped by the militants, tortured, tried, and ... The next attempt to seize the American Embassy was planned for September ... 

   
   

   the Embassy personnel in Tehran then to the United States Iran became the Great Satan of the Middle East. It has sort of stayed this way every since around 1980 when they kidnapped the U.S. Embassy personnel. 

   
   

   However, after putting Saddam Hussein up to starting a war with Iran, the United States then gave weapons to whatever side (both Iran and Iraq) was losing because the U.S. had great worries about either side winning and taking over the whole middle East. By doing this the U.S. and Europe kept the war going until 1988 when no one won but thousands had died.

   
   

   Then when Saddam Hussein took over Kuwait with his troops the U.S. saw it was right to worry about Saddam Hussein. Even though some people think Bush 2 going into Iraq wasn't a good thing it is debatable because most people know Saddam Hussein was as dangerous as Iran still is.

   
   

   Because both Iran and Saddam Hussein were hell bent on obtaining nuclear weapons. Now, with Saddam Hussein gone only Iran is (and maybe Saudi Arabia) both of which could buy one or already have from North Korea because North Korea is known to sell nuclear weapons to the highest bidder which is why the world is very worried about North Korea right now. And also about Iran and Saudi Arabia having obtained already or in the future obtaining nuclear weapons. 

   
   

   From my point of view Iran and Saudi Arabia already have nuclear weapons. If they didn't they would be fighting each other directly with their armies instead of having proxy wars in Yemen, Syria and Iraq.

   
   

   This type of warfare (proxy wars) was demonstrated to the world through the Cold War how nations with  nuclear weapons and  power ONLY fight through proxy wars because otherwise all life on earth and possibly the earth itself would end.