What Iran now has

is probably a great mess of partly-enriched uranium, and an undying hatred of the US and Israel.

Sounds like a recipe for one or more dirty bombs to me.

Even worse they can presumably fit something which distributes this crud to one or more of their ballistic missiles.

Let's hope they don't do this, because the consequences are likely obvious:

1. Dirty bomb attack on Israel or the US (not by missile);
2. Nuclear response by Israel or the US;
3. Russia is now very cross, uses nukes perhaps in Ukraine or against Israel;
4. Escalation from there.