What is Krakauer most worried about at the beginning of "Into Thin Air"?

As soon as hitler took over, he began persecuting jews. what does persecuting mean in this context

Critical thinking questions what factors led to the creation and implementation of operation reinhard? how did the residents of the ghettos respond to mass deportations and what occurred when the residents realized what happened to those deported? what did rudolf hoess’s testimony at the end of the war suggest about the final solution and planned deportation and resettlement? how did operation reinhard differ from earlier nazi actions and how was it similar? was resettlement seriously considered and why was it not used?

What do you call a person who is mean in school?