Remember when Jon Stewart famously told the “Crossfire” boys that they were “hurting America”? Well, now two political scientists are saying the same thing about Stewart. In a study, students who watched “The Daily Show” developed cynical attitudes about politics, the news media and the electoral system. Actually, more cynicism and skepticism would be helpful in the age of Bush and his Lies. But if, as the study suggests, “The Daily Show” turns young people off from voting, we can’t be happy about that.