"US forces will be targeted if they stay," Larijani has also told the pressAsia Times Online :: Middle East News - US and Europe drain Iran's half-full glass
This Seyyed, and the writer of the article, are talking through their Turban and hat respectively. There is a proxy war going on in Iraq. The Seyyeds are using Iran's wealth, to build a bomb and get back the old caliphate with its capital in Baghdad. I bet you that in the Seyyeds' mind, he wants to build a new state stretching from Islamabad to Baghdad and to the Levant with Baghdad at it centre.
Trouble with that idea is that Ur in Iraq (which is why Iraq is called what it is in the first place) is where Abraham was born. That brings in the two other religious fanatics from the Jewish and Christian side. So Iraq does mean more than just oil to the US, with its Evangelists.
As far as Iranians are concerned, all three "religious" reasons, are just that, "religious". The capital of Iran was called in the time of the Sassanians Cteisphon (and we Iranians pronounce it Teezfoon). The Sassanians had plenty of tolerance and all the younger faiths than Iranian philosophy could live. In fact in the light of Zoroastrian tolerance, other faith were encouraged.
Ironically the younger faith did not reciprocate did they, and apostates like Salman Parsi were encouraged to burn all of Iran's books. So the younger faiths have lost their right to anything. They broke the peace, and that is why they are where they are. You cannot ignore history.