Dissenting in part, Judge Jacobs agreed with the majority except for its holding that the proviso banning challenges to existing welfare laws effected impermissible viewpoint-based discrimination.
Judge Jacobs agreed with everything except for proviso banning challenges to welfare laws. 
mnli hypothesis: Judge Jacobs agreed with everything except for proviso banning challenges to welfare laws.  premise: Dissenting in part, Judge Jacobs agreed with the majority except for its holding that the proviso banning challenges to existing welfare laws effected impermissible viewpoint-based discrimination.