adhmedijahad "may" have said it "once" in a loose translation by our media to benefit out ramping up of war efforts.
IMO, if the guy meant it, he'd be saying it 10 times a week, to every microphone within reach. instead, he may have said it once, and we're not really sure? But for some reason, the media reports that quote constantly.
If he does, that's betwen him and israel. Let Israel bomb iran, that's fine. Just don't use US $ and men to do it.