It's funny, now that I really think about it, and after having lived long enough to form some of my own ideas. When I was younger, I was informed that misogynist was a term describing men who hated women. No further explanation was offered; no psychological profiling; no armchair psychoanalysis---nothing. As a young and impressionable(?) man, alone and defenseless in the world, I was content to let things stand at that. I mean, it seemed facially straight-forward; no facades, scams or mumbo-jumbo. Years later, when I was introduced to the word sexism, I began to finally wonder about misogyny and what that really meant. Now, after all these years, I offer this much, in response to Manne's distinction:

As a practical matter, sexism and misogyny are brother and sister (to use a metaphorical artifact), just as 'social relations' and 'patriarchal social relations' are slightly different phrases for the same set of traditional ways of regarding and treating women. These have been handed down through 'scriptural' writings and religious dogma for, oh, a few thousand years. Maybe these are, in fact, 'moral manifestations'? Or are they, more likely,(and simply) expressions of male-dominated societies, regardless of morality, or the dearth thereof? You may wrap this up in any sort of package that suits your disciplinary position(s). But, it all boils down to men being men, damn the torpedoes, and full speed ahead! ...seems to me.