The Cold War era (and its successor era) changed how men were viewed by women. In the WWII period and earlier, men as a whole were considered to be the bulwark against which threats to the nation would be stopped, and afforded much respect as a result.
Nuclear (and more so thermonuclear) weapons changed this. No longer were men as whole the defense of a nation, rather the weapons were. And they required only a few men to develop and deploy them.
Furthermore, all civilians (including women) were now on the potential front line. This made the situation a twofer in terms of emasculating men as defenders of the nation.
Of course, the U.S. still had small wars to fight, and men did fight in them. But from the perspective of women, they were sideshows. None of these wars were any real threat to women. No invasion was forthcoming. The result was that women had little respect for the men that did fight in this actions.
This situation is just one more nail in the coffin in terms of men’s degraded status with respect to women. And we all pay the price for that.