They believe that Muhammad is a manefisation of god:
The Imams of Twelver Shi'ism, that is, the Prophet's son-in-law 'Ali Ibn Ali Talib and his eleven descendants, also seem to have taught that God is beyond conceptualization. When the fifth Imam, Muhammad Baqir (d. 735/6), was asked by a believer whether it is permissible to attempt to imagine God as an entity, he is said to have replied that this is allowed only if one imagined Him as an entity that is beyond reason and unlimited.
[6] The Imam thus taught that God is indeed an entity. But He is, as later Imami Shi'i theologians were to formulate it, an entity unlike other entities.
[7] Bahá'u'lláh amplified the teachings of the Imams and of Shi'i tradition in this respect.
Bahai-Library Online
They feel that the teachings of Muhammad (and other prophets) are only applicable for that day but only the prophets of Bahai are relevant for interpretation of past prophet teachings
Each Manifestation may be seen as a skilled physician. He has a complete grasp of the nature of the body of humanity and is able to prescribe the appropriate cure for the ills of the world—one that best meets the requirements of the time in which He appears. Referring to His own Revelation in this age, Bahá’u’lláh wrote, “
The All-Knowing Physician hath His finger on the pulse of mankind. He perceiveth the disease, and prescribeth, in His unerring wisdom, the remedy.”
5 Bahai.org
So, jesus, krishna, muhammad, buddha, and christ are all manifestations of god. The recent one is Baha'u'llah.
Throughout the ages, humanity’s spiritual, intellectual and moral capacities have been cultivated by the Founders of the great religions, among them Abraham, Krishna, Zoroaster, Moses, Buddha, Jesus Christ, Muhammad, and—in more recent times—
the Báb and
Bahá’u’lláh.
They believe that god prophesied Bahuallah's appearance and that because it's an interpretation from god (and presumably the same god as Muslims, Christians, Hindu, and Jews) all are in line with each other in a progression of revelations.
They did this by Bahaullah making all religions one:
Then all disputes would disappear, all then would be united. Bahá'u'lláh came for this purpose. He has made the three religions one. He has uplifted the standard of the oneness of faith and the honour of humanity in the centre of the world. Today we must gather round it, and try with heart and soul to bring about the union of mankind.
(Abdu'l-Bahá, Abdu'l-Bahá in London, p. 43)
So basically, in the first generation of posts on these threads I and other
@Vinayaka where trying to get Bahai to understand the conflict between Hindu and Bahai teachings. I tried explaining the difference between Buddhism and Christianity. A few say they are christians but identify as Bahai. Yet, all the religions (in one post) possess the same "essense" of love and compassion that everyone is supposed to have. Yet, this is defined not by all religions that they want unity with but a selective revealed religions that interpret everyone else's religions to take out war and crime etc and be at peace.
The fundamental truth of the Manifestations is peace. This underlies all religion, all justice. The divine purpose is that men should live in unity, concord and agreement and should love one another.
(Abdu'l-Bahá, Bahá'í World Faith - Abdu'l-Bahá Section, p. 245)
The problem with Buddhism and Christianity is that Buddhism doesn't have a god so there and Maitreya (one of their revealed prophets) is not a buddha as said but a bodhisattva. In addition, Buddhism talks about not following gods (specifically Hindu) but one's own mind and understanding.
Christianity is not an universalist faith. So, if all doesn't come through Christ without other prophets outside the Bible, one is not christian and does not hold christian teachings. Bahai disagree but their focus is different and doesn't correlate with christianity.
Hindu Krishna is a god in his own right and an incarnation of Vishnu. We've asked if god can be a manifestation of god but no one has answered. Other than that, I dont know much about Hinduism to say much more.
So in the Quran, does it support Bahaullah being the last prophet and promised one for this time period that Muhammad only revealed in his own?