You mean they use it to make a bomb? Nah!... They already have one if you ask me. Courtesy of Mr Khan from Pakistan, no doubt.
I doubt they have the material yet. But I agree they probably have everything else. Thats why this is so important. But them dont worry BP informs us the Iranian minister of the interior assured him that nukes are against their religion and they could never even make them nevermind use them. So relax.