Iran should and will of course respond to the attack.
I think they will do it in an unexpected way, I think it will be a precise and targeted attack.
If Israel is able to realize that they started it and does not respond then everything will be good for a short period of time.
If instead they F around they will find out along with the world how fun fire and brimstone is.
I believe they will not, or at most any response will be symbolic
Controlled US MSM only hints at "intense diplomatic activity" but in fact it seems both Russia and China are very strongly telling Iran to bide their time. We can only speculate what their bigger plans may be.