After Desert Storm, when he saw how good the depleted uranium penetrators were for armor piercing rounds, Saddam decided to make his own. But he had to have uranium to do this and the best uranium for DU rounds is U-238. (U-235 is lighter so it won't work as well.) So he got yellowcake, and refined it to get uranium metal. Then he tried to get rid of the U-235 by isotope separation, leaving only good old U-238. The U-235 was just the industrial byproduct of a program to upgrade his anti-tank capabilities. He was probably completely unconcerned about what to do with such an industrial byproduct such 30-40 kilograms of U-235. I mean, what would you do with such stuff? It was all innocent.
And they all lived happily everafter.