Ok, correct me if I am wrong, but here is my understanding:
1). Steppers believe Dr. Silkworth's theory that we are allergic to alcohol.
2). Christians believe that in order to be a good Christian, you have to drink Christ's blood.
3). To drink Christ's blood, you have to drink consecrated wine, which is an alcoholic beverage.
Accordingly, because steppers are allergic to alcohol, and because one can consume Christ's blood only by drinking an alcoholic beverage, in therefore follows that steppers are allergic to Jesus.