Your reasons for appeasement are strikingly similar to the arguments against attacking the relatively weak Nazis in 1937, 38, or 39.
And, just like the Nazis, the Iranian regime despises the Jews, believes it is their destiny to conquer their region and then establish a global caliphate.
If you think a preemptive strike on Iran is expensive, just wait till you get the bill for a war with a nuclear armed, regional superpower Iran.
OLD MIILITARY ADAGE
Delay the Butcher’s Bill,
Pay Tenfold in Blood