Direct quote from the article: It is a sexist act because it requires violence against a woman. That is because immorality and sexism are independent quantities. Sexism can be moral and immoral; immorality can be sexist or chaste. It's a reference to The Perils of Pauline: Which, incidentally, came out the year before Birth of a Nation: An achievement in which you burn a black man on a cross would likely stir up controversy as well. But it probably should be. TV has gotten shit for this since its inception; it's silly to presume games would be immune. One needn't choose one or the other. Both are valid discussions.The person never really defines why it isn't ok.
So the objective is to locate a woman who cannot defend herself against you, tie her up and then kill her by placing her in the path of a train. You cannot gain the achievement by performing this act on a man.
They never take a moment to consider the context of an M rated game where you do thousands of similarly immoral acts, and the writer never defines why this achievement is sexist.
It's a reference to old western movies.
"oh no we were violent to a girl" is nothing in a game that is basically about being senselessly violent.
"why are all the women vein and ignorant in X game" is a far better point and actually has value to being discussed.