The second part is more difficult. Goodness does not rush in to fill the vacuum left by receding evil. You must work to create it through a march of structured, programmed activities that impress its values upon you. Not once a week, not once a day, but constantly. Rosenberg, then, is wrong on two counts.
Coarse stimulation does work on a primitive level, while goodness requires sophistication.
Surely it is not the only contributor to the escalation of evil. But it is silly to dismiss its effect. Its most harmful consequence, though, may have little to do with its content. There will be more Littletons until we take the pursuit of goodness seriously. While others may have to scrounge around a bit to find a collection of goodness exercises, we Jews know exactly what they are called, and where to find them.