Paul is speaking about the way others think of him and his coworkers. AT: "if people think we are crazy ... if people think we are sane" (See: [[rc://en/ta/man/translate/figs-idiom]])
Here the word "him" refers to Christ. This can be stated in active form. AT: "Christ, who died and whom God raised for their sake" (See: [[rc://en/ta/man/translate/figs-activepassive]])