My recollection of that comment was that "Israel should be wiped off the map". Iran didn't say they were personally going to do it and they are not the only people who have a hatred of Israel. However, I will concede it was a reckless comment to make in political circles.
I never said they were trustworthy but they are no more or no less trustworthy than our American colleagues. You surely don't believe every word that comes out of Bush's mouth do you?