Wonderful, wonderful questions - all of them from chapter 10 on, Tunde. As far as your question about Heck Tate, where does he say he shoots people he thinks are guilty????
As far as Jem goes are you referring to when Jem talks about Dolphus Raymond's family, as his "hurling out harsh, racist terms without any obvious sadness?" I think Jem is just ignorant of how he sounds - children pick up what they hear and given the attitudes in the '30's his description of the Dolphus Raymond children not being accepted anywhere would be accurate, though I agree, the way he puts is hard to take.