Why is Newar considered a caste not a community or a civilization?

Newar Family Kathmandu newar It has developed unique elements, such as the Newar caste system, in which the roles of the Buddhist community are determined by a hereditary caste system, newar title a member of a people of Nepal who traditionally reside in the Kathmandu Valley and surrounding regions a Sino-Tibetan language spoken by the Newar

newar nepal Biology Newar in the Marathi language is the name of a plant identified with Barringtonia acutangula Gaertn from