Why does charles kikuchi refer to james fisk and members of the joint immigration committee as "so-called americans"?

Charles Kikuchi was worried that he would lose his right to vote during his internment. He said that James Fisk of Joint Immigration Committee has arranged a protest to disagree or oppose the right of the Japanese Americans to vote through an absentee ballot. He thought that they were stabbing them in the back and there should be a different or separate concentration camp for such so-called Americans. He also thought that they were a lot more dangerous than those Japanese in the US. 

The constant presence of diseases or infectious agents within a given geographic area or population group. it may also refer to the usual prevalence of a given disease with such area or group. it includes holoendemic and hyperendemic diseases. a holoendemic disease is one for which a high prevalent level of infection begins early in life and affects most of the child population, leading to a state of equilibrium such that the adult population shows evidence of the disease much less commonly than do children (malaria in many communities is a holoendemic disease). a hyperendemic disease is one that is constantly present at a high incidence and/or prevalence rate and affects all groups equally. so probably family history.