I stumbled upon this:
Mahayana (of the Chinese lineage) preserves Sutras, Vinayas, Sastras and Abhidharmas from all the Early Eighteen Schools. All the scriptures are served as reference instead of presiding over any particular school.
Theravada inherits Suttas and works from the Vibhajyavāda (meant the separatist, a sect active esp. around 300CE teaching different/ newly interpreted doctrines that contradictory to the Early Eighteen Schools). In addition, Theravada its original name was Tambapaṇṇiya (meant Ceylon School), its scriptures and works are from the Mahāvihāravāsins (monks of a monastery in Sri Lanka) only:
The Mahavihara Theravādins of Sri Lanka are descendants of the Sthavira Vibhajyavādins in South India who used the Pali language… — Vibhajyavāda, Wikipedia
The Mahavihara Theravādins of Sri Lanka are descendants of the Sthavira Vibhajyavādins in South India who used the Pali language, differing somewhat from the northern Sthavira schools. The Theravādins hold that Vibhajyavāda was the favored doctrine during a Buddhist council that took place in Pataliputra under Ashoka. As Gethin notes, the sources are rather confused on this matter however.
The Sarvāstivādin Abhidharma Mahāvibhāṣa Śāstra describes the Vibhajyavādins as being the type of heretics who “make objections, who uphold harmful doctrines and attack those who follow the authentic Dharma”.
Is this claim true? Does the Pāli canon descend from “heretics”? If so, heretics according to whom, why?
P.S : and is her message accurate, more generally?