Why on the seder are we excluding the evil son. In the Hagada it says "break his teeth,etc", "tell him if you were in Egypt you would not have been redeemed".
Yet on Yom Kipur we say on kol nidrei we invite all Jews, even the bad ones "it is permitted to pray with avaryanim (sinners)"
Furthermore, the talmud says "Any ta'anis tzibbur, that doesn't include the "poshei yisroel" is not a real taanis" (forgot the exact source) (any fast without sinners is not a real fast)
So it seems that all other times we are inviting the waywards Jews. Why specifically on pesach do we exclude them like this?