Actually it is short because there is no argument. You are comparing apples and oranges. Actually a more apt description would be apples and cyanide. A mom titty dancing for a living is not a father screwing his daughter. If you can't see that something is wrong.
The two have one thing in common- cultural decay. They are peas in a pod, not apples and oranges.
The school, and Christianity itself, are in opposition to this decay, it is rightfully their perogative to determine who they are going to serve. Denying that perogative is simular to denying free speech- you may not 'agree' with thier position or you may think it is too harsh, but at some point you must respect their right of association and allow them to excersize it how *they* see fit.
A society that dictates 'tolerance' is no better than the Taliban, for both infringe on liberty.