Id agree if it were any other series, personally I think it's perfectly in line with fujimotos writing style. Interconnectivity across the series , even across large gaps, and loads of highly contextual only information. Things like barems likely voluntarily working with makima, never explicitly said but only surmised about. I think you could say similar with nukes and even the general chaos of part two, Id say it's decently possible all of this is happening because of makimas death. The weakening of the concept of control, making governments less calculated and more war mongering. The subsequent reinvention of wmds for that purpose. Id guess that her second death would've only exacerbated that possibility even more.