In terms of the Iranian embassy not being here, yes, they were up to some pretty nefarious activities, but their having a presence here helped us be able to see, monitor and track those activities in a way that we can't now.
On the question of the reaction if we were to act now, I agree completely with what the professor said.
One thing, though—maybe this is what was meant, but I don't know—is that it would be presented and perhaps perceived in other countries in the world that we're doing this to benefit Israel. If that's the problem, too bad. I don't think international reaction should be a deterrent to our doing it. The Iranians will be ticked off, but so what?