Pesah - Haggada
Maggid - 4 sons
What is the difference between our reponse to the wise son relative to the response to the wicked son? The wise son asked what are these rules for you and the wicked son asked what is the service for you. Why do we react so harshly to the wicked son when his question was not so different form that of the wise son?
The wise son, while maybe not being perfect, is still interested. He is searchign for answers. he is looking for the truth, in his own way.
The wicked son is a scoffer. He is a rejectionist. he is looking for ways to reject Judaism and show us that he is rejecting it. he is not lookign for answers. he is motivated and fueled by personal interests.
That is someone who you cannot give an answer to. It is wasting your breath to try. Nothing you say will be heard. So the wicked son requires a harsh response.