Nick Mamatas' (Character) Class and The Game of Life is a fine reply to John Scalzi's Straight White Male: The Lowest Difficulty Setting There Is. Nick hangs with a lot of SJ Warriors, but he's more of an Ally than a Warrior, sticking up for his friends and indulging in his love of gossip.
Someday I need to write about identitarian socialists, the people who like Roediger's Wages of Whiteness and don't notice that even Roediger acknowledged it has problems. If I wanted to play the psychoanalytical game, I might argue that some of the white ones suffer from guilt for their racial connection to white capitalists, and others suffer from envy of Malcolm X, Angela Davis, and the Black Panthers—they wish they could trade the white skin of the slaver for the black skin of the people who were for centuries the most abused of the US's working class.
But white guilt and white envy both miss the fact that black folks owned and sold slaves in Africa and the US. There is no shade of human skin that isn't linked to the slave trade—or to any human evil. Better to reject the notion that children bear the sins of their parents and work to build a better world.