Question: why are the fett not mandalorian?
Answer: Boba Fett is not technically a Mandalorian Jango Fett raised Boba Fett as his son on the planet of Kamino. While Boba Fett is taught the ways of the Mandalorians and wears the armor of the bounty hunters on that planet, as a clone, he doesn't really have a homeland or truly grow up in the Mandalorian culture.