I'm pretty sure they're saying that the 4 points I listed are a good argument against a battlefield nuke strike, but much less compelling when it comes time to

I'm pretty sure they're saying that the 4 points I listed are a good argument against a battlefield nuke strike, but much less compelling when it comes time to launch an all out nuclear assault on the United States. Presumably by that time, the battlelines are clearly drawn and it's a fight for survival.