If Nuclear Power is a Pretext for Nuclear Weapons, Then NO
There is a view that Iran's pursuit of nuclear power is really a a weapons program.
If Iran cannot or will not abide by the terms of the Non-Proliferation Treaty (NPT), then it should not be allowed to have a nuclear power program.
The more compelling question is: "What can be (or should be) done if Iran persists with a nuclear weapons program?"
What is a concern is that Iran may not stop such a weapons program, even if faced with embargoes or other actions.

Your sentence should read:
Nuclear power is a pretext for nuclear weapons, therefore no.
And you should be on the other side of the question.