I mean, the fact that these people are wearing a uniform means that the civilian cause has got to the place in time where civilians, who have the resources, need warriors to move the cause forward or the cause needs to be defended. The uniform signifies unity to the cause as well as a union of brothers, and in the case of the article, brothers and sisters.
So mothers in uniform defending breast-feeding has little to do with people in military uniforms endorsing civilian causes, because they do that everyday. The real issue is how can a warrior endorse a civilian cause and still maintain looking like a warrior in the process?
This is a situation in which the culture is literally “eating” the structure, which the uniform represents.