Fiz - Really - You really don't see a-priori how that is a false premise ? Where is ANY evidence that the objective is 'to have Iran 'give up' ALL nuclear material ?
And as to the other - yeah, crude nuclear bombs ARE easy to make - 'ceptin of course for the active ingredients. N.Korea got 'em thru ole Wee Willie Wanker supplyin' 'em the raw materials AND the tech to refine 'em, lest ya' be a furgittin dat liddle pearl of history also.

Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good ...