>>10
Of course! Attacking germany before the invasion of poland (or before the anshluss and all that) would be wrong. The only indication of future aggression were an increase in mobilization and defense expenditures, a nationalistic and racist propaganda (but who weren't racist in those days) and vaporous ambitions on world domination. If these are reasons enough to trigger the invasion then US should be invaded promptly!
>>16
Iran weren't communist under Mosaddeq, they were nationalist. They committed the crime of believing that their oil were theirs...
http://en.wikipedia.org/wiki/Mohammed_Mosaddeq