Kshatriya in the context of early Buddhism is a Vedic term not a Hindu term The fact that the Vedas Upanishads are all part of Hinduism does not imply that the Buddha was a Hindu nor that the Vedas and Upaishads were Hindu at the time they were composed I ve given several references to reliable sources I think you should read them instead of repeating yourself Hunduism is a synthesis of a broad range of traditions which took shape under socio economic and political circumstances 9ask the simple question who s the boss which religious specialists does he need for support Which religion was better able to incorporate popular religion Brahmanism or Buddhism This is the standard scholarly opinion and so obvious that I actuually don t understand why people don t see this is it a matter of misinformation Not familiair with contemporary scholarship