Keep in mind that Iran has had two major data security compromises (that we know of) targeting their nuclear enrichment facilities, slowing down their timetables and costing them quite a bit of money.
If I had to come up with tactics for preventing any further problems like that, "let's look at the example from China" would certainly be on the table.
So why are they connecting the nuclear facilities to the Internet anyway? And why can't they just built an intranet only for the nuclear facilities. Sounds like a false reason with a different agenda behind it to me.
IMO it's entirely because they're worried about another Arab Spring. If they control the only Twitter and the only Faceburqa, it becomes much more difficult for protesters to organize on that scale.
If I had to come up with tactics for preventing any further problems like that, "let's look at the example from China" would certainly be on the table.