Yes, this is true. But so what? It doesn't change the facts today. Lesson learned, move on. Berating ourselves over stuff our grandparents did doesn't accomplish anything.

We really don't want Iran to possess nuclear weapons because they have an entire branch of their military service devoted to radicals, some of whom are likely straight-up wingnuts. Oh yeah and their religion specifies that Armageddon starts with massive conflict on earth followed by a second-coming of sorts (12th Imam). There are those who believe that starting a nuclear war with the US and/or Israel would precipitate that, and they'd all go straight to heaven. Seriously. Even the loon in N. Korea doesn't think he can actually nuke somebody and survive longer than an hour or so.

And to make matters worse, Israel CANNOT take even one nuclear hit so they are in the position of likely having to conduct a first strike if Iran develops a nuclear + delivery capability, or gets too close to it.