'all these lefties'? I'm left-wing, send my child to a state school, as do tens of millions of other people of many different political persuasions.
Couldn't care less where Self sends his son but I do object to people seizing on it with glee to justify their own decision to go private. You get to choose for your child, and if you are intelligent and rational you are aware that your decision has an impact on everyone else, too. Ds is at a very good state school - there are other children who didn't get a place there. You have to live with the results of that decision, whatever it is.