What, Understanding the basic beliefs of Hinduism?
I think you want to ask that what is basic beliefs of Hinduism. If you want to know about religion Hinduism, then their scripture says it is prohibited to do idolatry, to drink alcohol etc and it is permitted to have more than one wife, eat flesh of cow etc and it is obligatory to do hijab that is protecting chastity etc. For more, you can listen to lectures of Dr Zakir Naik. One thing I want to mention that Hinduism and Islam share lots of common features, I have mentioned it already. But if you want to know about modern so called Hindus, they all are ignorant. They do not know their religion. Hardly any Hindu read Vedas. They all are lazy enough to read and follow Vedas. They follow their lust and worship their pundits. They don’t bother to learn their scriptures. If they will learn and follow their own Vedas, they all will become TRUE MUSLIMS, Inshallah.