zealot
n//ˈzɛl.ət//fanatiker, selot
One who is zealous, one who is full of zeal for their own specific beliefs or objectives, usually in the negative sense of being too passionate; a fanatic.
(historical, Judaism) A member of a radical, warlike, ardently patriotic group of Jews in Judea, particularly prominent in the first century, who advocated the violent overthrow of Roman rule and vigorously resisted the efforts of the Romans and their supporters to convert the Jews.