In fact, about the only intense bombing of Iraq done by the United States in the last twenty years was for two weeks at the start of the 2003 war and one time in retaliation against an assassination plot against former president George Bush. From time to time, U.S. planes also hit Iraqi radar defenses but this was not a likely reason for the September 11 attacks. The picture that Paul's statement implies is some sort of constant attack targeting Iraqi civilians.
Moreover, if you actually read what Usama bin Ladin and al-Qaida said, they were not complaining about bombing but about how the United States allegedly killed about one million Iraqi civilians by starving them to death through sanctions. That was a lie put out by Saddam Hussein' regime at a time when he was importing luxury goods for his family and elite while using money intended for buying food to buy arms instead.
So Ron Paul is actually just echoing Saddam's lies, passed on to bin Ladin, that America was committing genocide in Iraq.
The nationalist government of Muhammad Mossadegh had nationalized the British oil company. While a well-intentioned democratic-minded modernizer, Mossadegh was also an erratic and incompetent personality and prime minister. And the social base for parliamentary democracy in Iran was clearly not strong enough. In the face of a British embargo on Iran selling its oil--the British argued that it was "stolen property"--and many domestic problems, the country was spiraling into chaos. While the British were interested in getting the oil company back, the United States was worried about a Communist takeover. A group of pro-Shah Iranians teamed up with the British to propose a "counter-coup" in which the Shah would break openly with Mossadegh and the monarch's supporters would overthrow the prime minister.
What is especially interesting in retrospect is that one of the main supporters of the move were the Iranian Muslim clerics, including Ayatollah Kashani, the man who would be a role model for Ayatollah Ruhollah Khomeini. I saw how he and his colleagues met with U.S. officials and urged a coup, since they also feared a Communist regime. It is ironic for Islamists to complain about a U.S. policy that they actively backed at the time.
I have stated things here briefly and have not done justice to the complexity of the situation. A real argument can be mounted against U.S. policy at the time but in the end I don't find it convincing and this is certainly not a case of an unjustified action aimed against someone because he was a liberal reformer or moderate nationalist.
They also have something else in common: they ignore or misunderstand the internal realities of other countries. The Islamist regime in Iran doesn't hate America because of its past policy toward Iran but because it stands in the way of Tehran's program: Islamist revolutions everywhere; the destruction not only of Israel but of virtually all regimes in the region; and their replacement by Iran-style governments and societies.
The issue--as with the USSR and the fascist states--is not hatred of either U.S. policies or freedom but the fact that America is a geopolitical enemy, making it harder or impossible for their radical ideology to conquer the world or at least their part of it.