Of course Ahlus-Sunnah has and must have respect for Ali Radhiyallahu 'anhu and ahlul bait. They just dont go beyond the boundaries like Shi'ah do. Alaihis salaam is a title reserved for ambiyaa and malaa'ikah. The Shi'ah use it for Ali Karramallahu wajhah...maybe it's because some of them believe his (and the rest of their imams) status to be higher than that of a Nabi.....well.... There you go. Wal 'iyaadhu billaah.