Jack testifies for Kate

Jack shows up in another flash forward to testify at Kate's trial. During his testimony, we learn a little about the story that the Oceanic 6 are telling the public including that 8 people survived the crash, the marshal died in the crash and that Kate saved the day by giving first aid and finding water and food. If 8 people survived, why is there only the Oceanic 6? Interesting, no?

Angry guy outside courthouse

Who is this angry guy outside the courthouse at Kate's trial and why is he so angry?