Earlier quoted context omitted.
Don't underestimate Iran. They aren't quite the US or Japan, but ahead of any middle eastern non Israel nation, probably ahead of India in many ways, and on par with Brazil or Spain or maybe Italy in terms of domestic engineering talent and ability.
On the other hand, they are not geniuses to solve the problems of internet security once and for all. All they might manage to do is stop free flow of information into and out of the country. The "Iron curtain" never helped anyone. To use Huawei's equipment to achieve their national security needs is just naive. You might as well handover your country's internet infrastructure to China itself. [EDIT: Added some links…
Huawei probably won't help the USG vs. Iran, so using Huawei for this is a better choice than using Cisco, actually.