If you ever do a first strike, the world the next will changed in such a profound way that would it even matter if you are seeing as the bad guy? Any leftover

If you ever do a first strike, the world the next will changed in such a profound way that would it even matter if you are seeing as the bad guy? Any leftover sense of moral and sanity is probably more likely to be relevant. Tactical use of nukes, as opposed to a strategic first strike, is different of course.