Morgana threatened the man furiously, she was so angry when she heard the man talk about her mother. Calling her mother stupid for getting herself shot accidentally by the assassin.
Apparently, the three men that they captured and brought back to the island were members of the dark organization, furthermore, they also know about the assassination attempt on David that almost took David's life in Seattle.
When the three men heard Morgana, they all laughed together, as if they are taking Morgana's threats as a joke.
