en_tn/act/26/04.md

all the Jews

This is a generalization. Possible meanings are 1) Jews in general who knew about Paul. Alternate translation: "the Jews" or 2) Pharisees who knew Paul. Alternate translation: "the Jewish leaders" (See: rc://en/ta/man/jit/figs-hyperbole)

in my own nation

Possible meanings are 1) among his own people, not necessarily in the geographical land of Israel or 2) in the land of Israel.