If Catholics believe that people in other denominations are lost then they should out of a love for the lost seek to convert them. OTOH Catholics should not complain when other denominations through the same Biblical mandate and motives of love seek to convert Catholics to their own denomination or seek to baptize their dead. Oh, we'll still complain! If we stopped complaining about that, believing what we do about the nature of the Church, we'd be stinkin' liars. :)