Division and caste system still exists within the newar community, and I don't think it started just after the Muluki Ain. They were divided a long time before that, probably during the times of Jayasthiti Malla. And the discrmination that exists between the castes within the Newar community is unimaginable even today. The rules are the most strict ones in comparision to ny other Nepali community. Higher caste 'hindu' Newars will never have an arranged marriage with 'Buddhist' newars. And do you know the consequences if a Joshi or a Rajopadhyaya marries a Sayami / Dongol ?? It is as worse as marrying someone out of the Newar community, if not more. And Pode / Chyame / Kusule and other untouchable castes being allowed to enter the homes Newars of higher castes is an unimaginable dream even today, that too in the core city areas of Kathmandu Metropolis.....Strange but very true.