Was Mahayana a covert 'rebellion' aginst the original teachings of the Buddha?

I read the following excerpt from a Hindi Book - Translation - > **Due to a lack of the concept of God and the soul (ātman) within the doctrine, certain > individuals rejected the original Dhamma.** Subhadra was among them, who > reportedly expressed satisfaction at the Buddha’s passing. > > Over time, these dissenters grew organized. Rejecting the original > Dhamma, they formed the Mahāsāṃghika sect, which was later transformed > into the Mahāyāna. This shift took place at Vaishali during the Second > Buddhist Council, roughly a century after the Buddha’s > Mahāparinirvāṇa. **Mahāyāna thus emerged from those opposed to the > original teaching, and its adherents systematically sidelined the > Buddha’s original mission.** By translating the Pali Canon into > Sanskrit, they rendered it inaccessible to the common people. In the > process, they undermined Pali literature, weakened the language > itself, and distorted the original Dhamma. > > **The Buddha explicitly taught that he was a human being and should not > be regarded as God, prophet, or divine messenger. Mahāyānists > overturned this entirely by deifying him and recasting an originally > non-theistic teacher into a theistic figure.** While the Buddha never > endorsed ritualism and worship, they institutionalized precisely those > practices in his name. > > In the 2nd century, a Brahmin named Nagarjuna embraced Mahāyāna and > monumentalized it. In the 3rd century, another Brahmin from Peshawar, > Asanga, adopted it and fused it with yogic doctrine. Though Mahāyāna > originated in Andhra Pradesh, it rapidly spread across Punjab, > Afghanistan, Central Asia, Tibet, China, Korea, Japan, Sikkim, Bhutan, > Taiwan, and Nepal , absorbing along the way idol worship, yogic > practices, and tantra. Śūnyavāda, which would later reappear in > Hinduism in form of Advaita Vedānta was Nagarjuna’s teaching. > > **Mahāyānists did not stop at deifying the Buddha; they freely > incorporated and continued the worship of Hindu deities such as > Brahma, Vishnu, Mahesh (Shiva), Kartikeya, Chamunda, Ganesha, > Mahakala, and others.** They further incorportated the worship Hindu figures like the > Navagrahas, yakshas, gandharvas, and vidyādharas into their religious > framework. **In doing so, Mahāyāna became thoroughly entangled and enmeshed in a > dense web of theistic doctrines and miracle-centered beliefs.** ---------- Is this true ? Is there any support in Buddhist scholarship or early sources for the idea that Mahāyāna arose as a form of covert “rebellion” against the Buddha’s original teachings? Further, Are claims about intentional distortion of the Dhamma through systematic incorporation of external (e.g., Brahmanical) elements supported by evidence?