What were these women marching about? Was it anti Trump?
They're American women who live in a country of opportunity. They're respected and have the same rights as everyone else... so what are they complaining about?
It makes sense to protest about your own government, when they've actually done something specific, so when Trump proposes a bill to start putting women in concentration camps or legalising all pussy-grabbing or whatever he's supposed to be doing, then fair enough.
Over here though, if women are protesting about women's issues overseas (in US) they might also want to check out Saudi Arabia, for example.