Malaysia is a multicultural society. While Malays and other indigenous minorities make up a 69% majority, there are also 21% Chinese (especially visible in the cities), 8% Indian and a miscellaneous grouping of 10% "others", many of them tribes from the jungles of East Malaysia. There is hence also a profusion of faiths and religions, with Islam, Christianity, Buddhism, Taoism, Hinduism, Sikhism and even shamanism on the map.
Some Malaysians can be very extroverted and might talk to you uninvited but most Malaysians are shy at heart and are careful not to offend others, especially tourists. However, Malaysians are very friendly when approached and will usually go out of their way to help tourists find their way around if possible.