Which is actually worse. That's saying both "they're just small nukes" and "they can't attack back". No, it's not MAD in the case with Iran, but the point was once we start using things like that, we'll find reasons to excuse it and use them again elsewhere, and MAD will be tested at some point if that happens. We shouldn't even be having this kind of debate. We seemed to understand that for a while, but now it's like "well, tactical nukes are different".