It won't really hold the Iranians back much - they don't need a 2800-mile missle unless they intend to cover all of Europe. And it doesn't appear as if Europe cares very much if they do.
With the dramatic and continuing increases in the Muslim populations throughout most of Europe, Iran would be very foolish to attack many of their own. The invasion of all of Europe by Muslims is already ongoing, and they don’t even have to fire a single shot!
At 2,000 miles this bird came down somewhere around Wake Island. So when the feds state that this missile was not a threat to the United States, they are just flat out lying.