Dude I had read and was taught, before even these shah rulers, bahuns, chettris, ashoka, sharukh, even Buddha, Indians, afghanistan, there were Newars( the same descendent of the Tibetans(many will disagree this i know)), , who lived within themselves practicing Saivism(Lord Shiva), that's why Newars call themselves as children of Shiva just as the Americans call themselves people of God IDK why. Newars practice Ajima, parashakti maa, and follow all the hierarchy of Gods unlike the hindus of India and worldwide. Just as the history of India, history of Nepal is old too. The emerging of Buddhanilkantha statue from lake, the Manjushree chopping the Chobhar mountains to let the waters of lake pass so valley could be created. I don't know it's your opinion, I call myself, Nepali, I call myself a descendent of Newar first, I think Ashokaland is way later. That's why i spent most of the time searching for newar Samhita and Newari scriptures to decipher if it's all true. Dude I don't call myself from Prithvi Narayan's land, he is some descendant of India. Forgive me if I'm wrong, we all have our own theories.