The US supported Iraq 20 years ago and doesn't now; so what? We were on the verge of nuclear war with the USSR 25 years ago and now we're allies. Politicians aren't prophets.
Yeah, I don't like when they say 'he was your doing, so don't fight him'.

Yes, the USA created lots of 'monsters'. They also created Bin Laden, back in 1983 in Afghanistan. Back then, it was (or seemed) more important to fend off the USSR, than to worry about the integrity of those assisted by the USA. Maybe the USA shouldn't have, in retrospect, helped Bin Laden and\or Saddam... but that's in the past. They're both our enemies now.