Unfortunately, this threw the baby out with the bathwater, because the identification of differences is what the joy of life is all about. The world is full of differences, and discovering these is empowering to us personally as well as part of a group. To say everyone is the same is a recipe for boredom - it is the differences that light up the world.
I've read a bit of Mares and have seen the identification of differences, not sexism, but I am not fully informed when it comes to him.
I am unaware of how it is in India, but a friend of mine who was working toward his Ph.d in disability studies (before switching to something...I think in literature, believe there was competition with his wife who is studying the same causing strife.), was discussing Issues of equality; gender and cultural...and we were talking about how it is common just about everywhere you go in the United States to confuse equality with similarity, and difference with inequality. We agreed that to deny the differences is to foster an unfair or inequal situation. For instance if a child is excelling in school, to deny extra challenges so everyone can be treated similarly is potentially harmful to that child, and the same goes for the child who is not doing well. Or at a place of employment to require everyone work a similar schedule in the name of fairness, is unfair to those who can not work that schedule do to whatever other issues.
Sure if I work at it I can find ways that people are equal, but to do so by ignoring how they are different is to deny them their uniqueness, and as you said take quite a bit of joy out of life.
Further, Satori, to say good riddance to a recently deceased person on the grounds he was sexist, without justifying that judgement not only seems harsh, but could I perhaps draw a parallel between this thinking and the various forms of discrimatory thinking?
You have catagorizated someone as something less in value, said he was better off dead, therefor stating his life was not worth much if anything. Objectification is a key factor in discrimination, to objectify is in a sense to view something as not quite alive i.e. an object, therefor stating its life isn't worth much. Then you do not clarify this statement, you say it off hand, and haphazardly, like it doesn't matter.
You didn't really think about it did you? Judge not for with what judgement...you shall be judged.