The west will be more hesitant to act.
And, this has put the USA in more jeopardy.
It will take another 911 before we will act to protect our selves, it would be very hard for the President or the congress to be preemptive at this stage.
The only way to stop Iran will be through Israel, and I would think greater heads are working on this presently, or, I sure hope so in any event.