Re Khomeini, the US removed support for the Shah at the time of the Iranian revolution - see quotes in http://www.dailystar.com.lb/opinion/04_09_02_c.htm Not that supporting the Shah in the first place was a good move, but whether Khomeini and his associates were an improvement is questionable.

Re Hussein, after the Iranian revolution, the hostage crisis and the various other Iranian incidents, he was supported extensively by the West and by Russia. Obviously it wasn't just the US, but the US was certainly a major contributor. http://www.globalpolicy.org/security/issues/iraq/attack/2002/0923monster.htm

Graham.