If Iran does not change its policies, it won't be able to integrate into the international community and will become even more isolated than it is now, which likely will have a negative impact on the Iranian people.
Sentiment: NEGATIVE
If Iran becomes a nuclear weapon state it is the end of non-proliferation as we know it. If Iran gets a nuclear weapon you are likely to see Saudi, Egypt and other countries follow suit and we will bequeath to the next generation a nuclear arms race in the world's most unstable region.