Ranted for a few paragraphs about why MRA is necessary and how modern feminism is still dropping the ball on men's rights but I can sum up that long ass rant like this: Acknowledging the issues isn't enough, especially when major feminist organizations actively campaign against legislation aimed at helping men have more rights when it comes to their offspring. Paying lip service to the issues just plain isn't good enough!
With that out of the way, no, misandry does not primarily come from men. Just like misogyny, it comes from culture and society that is built by both men and women. In many ways we have a poor view of both sexes driven by traditional views about what makes a man masculine and a woman feminine. Traditionalists, made up of both men and women, push to keep these views intact, citing (bad) utilitarian reasons or tradition for its own sake. Progressives, made up of both men and women fight against these views, citing the damage such views do to those who don't fit the molds society wants to put them in. I for one think the progressive notions are, on the whole, correct and that neither weak utilitarian arguments nor tradition for its own sake are good reasons to marginalize individuals. Unfortunately, many of my fellow progressives seem to view these issues in what I find to be a bizarre light, as if every slight against men in society is really just a slight against women when it's actually a slight against both! As some in this thread have pointed out, all of these issues affect both sexes negatively. It is only when we not only understand this to be true but also ACT in ways to rectify the situation for both sexes that we will reach anything approximating equality!