When it comes to religion calling something "wrong" is too easily put out there. Did Jesus resurrect? Is it "wrong" that some Christians believe that? Baha'is believe that Baha'u'llah is a manifestation of God. Is it "wrong" for them to believe that? These are things that can't be shown to be right or wrong. And belief in either one has led people to become better people. But only because the "believe" and apply the teachings of their religion that causes them to do good rather than evil.
Following Scientology or the Book of Mormon can also cause people to become better, kind and loving people. But are those teachings true? The problem is when some people in some religions start acting as if everybody needs to believe in their religion. Baha'is might not force people to convert, but they sure seem to believe that their religion is the only way to bring about peace in the world. Which makes all the other religions "wrong", since they don't have the new teachings from God and can't accomplish the task of bringing the world together in peace and unity.
IMHO, just look for the Light CG, from no matter where it shines, this is a key to the Oneness of God, do not look for the darkness. The Names of God are One CG. Abdul'baha shows us how all names can become one.
"......"Question: Are not all Christians Bahá’ís? Is there any difference?
Answer: When Christians act according to the teachings of Christ, they are called Bahá’ís. For the foundations of Christianity and the religion of Bahá’u’lláh are one. The foundations of all the divine Prophets and Holy Books are one. The difference among them is one of terminology only. Each springtime is identical with the former springtime. The distinction between them is only one of the calendar—1911, 1912 and so on. The difference between a Christian and a Bahá’í, therefore, is this: There was a former springtime, and there is a springtime now. No other difference exists because the foundations are the same. Whoever acts completely in accordance with the teachings of Christ is a Bahá’í. The purpose is the essential meaning of Christian, not the mere word. The purpose is the sun itself and not the dawning points. For though the sun is one sun, its dawning points are many. We must not adore the dawning points but worship the sun. We must adore the reality of religion and not blindly cling to the appellation Christianity. The Sun of Reality must be worshiped and followed. We must seek the fragrance of the rose from whatever bush it is blooming—whether oriental or western. Be seekers of light, no matter from which lantern it shines forth. Be not lovers of the lantern. At one time the light has shone from a lantern in the East, now in the West. If it comes from North, South, from whatever direction it proceeds, follow the light...."
Bahá'í Reference Library - The Promulgation of Universal Peace, Pages 247-252
So there are many Baha'i out there that are just yet to let go of names and become One under One God. We can all help each other find the Light.
Regards Tony