Is Jean Louise's assessment of Henry later in the novel correct?

This is a complex question. Through Scout's lens I think it is correct. Henry's attendance in the meeting of the Citizen's Council Meetings does look bad. Henry says he attends only to fit in and perhaps further his political aspirations. In a way wanting to believe Henry is a raving racist might give her a way out of marrying him. Henry has to swim in the metaphorical cesspool that was Southern politics and racism. I think it is up to the reader to decide just what Henry really believes.