Hinduism and Mahyana are a monistic Universalism: the totality exists and nothing else. There is no multiplicity, everything is absolutely identical.
They mix this view with a huge amount of rituals, worship, idolatry, mantras, deities, chanting,entertainment with lengthy Scriptures with thousands of verses, sacrifice and sacred objects, and rules for lay people in order to create a religion.
For the Hindus and mahyanaists, people have the knowledge that they have a true nature, but people are misguided on what they take as their true nature. This is why the Hindus say that people are already enlightened, they just do not know about it... The true nature of people is not the 5 senses or their objects, but the mind itself with theworld [loka] itself identified with the cosmos, or their deification of this, ie their Brahma or their Buddha or non-duality, and when people realize this they are enlightened. The way to realize this is by relying on lots of sacrifice, chantings and rituals, also on material objects which magically purify the minds for them, like sounds, logic, mantras, little beads, amulets.
It is only when there is a alledgedly good creator [a god or just ''nature''] that it makes sense to ask the usual question ''why the cosmos produce things which do not know that they are the cosmos?'' ie ''why some good god did not get people to be born directly enlightened? instead of being born unenlightened which produces lots of suffering?''
So far the Hindus have no answer to this ''problem of evil''. The Hindus keep replying with their main thesis, ie ''because people do not know their true nature, which is pure being and cannot be described'' and that's their answer...
in Buddhism, there is no non-duality, people do not have a true nature, people are not the cosmos, people are not Brahma, people do not come from Brahma, people are not nibanna, people do not come from nibanna, people are not Buddha, people do not come from a buddha, people are not their mind, people are not loka, people are not born already enlightened. In Buddhism there is only craving for pretty things and the pretty ideas of having ''a true nature'' and there is a lack of craving for pretty things and pretty ideas. People get enlightened when they stop craving for those. The way to get enlightened is to purify the mind, however not with useless chantings and rituals nor with magical objects, unlike the Hindus do, but with the mind itself, ie all the time inclining [with the mind] the mind towards what the buddha calls good qualities and then directly knowing the mind as it really is, which is anicca, dukkha, anatta [contrary to what the hindus say], which is the condition for dispassion, dispassion which is the condition for liberation, liberation which is the condition for direct knowledge that dukkha is ended.