Israel's "Iran attack rehearsal"

Whyyy would you rehearse something without any intention of doing it? All the language that Israel's being using about Iran...and all of the threats from their ol' buddy -- our loverly country, the USA...says we wanna attack them. Congress recently was discussing putting Iran under siege -- not attacking them, but surrounding them...from the air and the sea, and not letting any stuff go in or out of that place. They said it was to put pressure on them to stop their nuclear program, even though there's still no evidence that they're trying to make bombs. And because Iran is a proud country, of course they posture and threaten back... It makes me uneasy, yes it does. Mostly because there's so many consquences which would be , beyond our control if either one of our countries...Israel, or America, decides to use aggression toward Iran. Economically, for one, whatever repercussions Iran might dish out because they were attacked for another...what kind of power vacuum it might create in the middle east...probably even more crap that we can't even think of besides the fact that we have no right to try to harm another culture over a SUSPICION.