Oh boy, I just can't keep myself out of trouble!
I have been a Baha'i since 1972. I am not active in the community at this point in time, however I still identify myself as such.
What I was always taught was to respect the spiritual practices of all peoples, and to respect the cultures of all peoples.
Some of those sites you have linked to, from quick perusal, are not representative of what I know to be true. There have been splinter groups over time that have their own take on things. Any group with a charasmatic leader at this point in time is a splinter group. Our local and national leaders are elected, and no one person is authority. It is a body of 9 members.
It would not surprise me if some people had latched on to Baha'i beliefs for their own purposes just as some have to Native beliefs.
I will say that from what I have seen in the Baha'i communities I have belonged to, there are high aspirations, and some difficulty achieving the loving close community they aspire to. Not true everywhere, but it is something I have seen communities struggle with.
Individual Baha's will make mistakes in their zeal, usually when they first join. They should be guided away from that. We are taught not to prostelitize. We are taught to respect all faiths and cultures.
In terms of what is and is not a part of Baha'i belief, your best source is
http://www.bahai.org/I would be sceptical of some of the other sites out there.
I feel like I have really put myself on the hot seat now, however, I have to be honest about who I am. Gosh I hope I am still welcome here.
I will answer questions as best as I can.
Nona
edited to add:
for the most accurate information, the Baha'i Writings themselves are a better source than any one individual, including myself. Individuals get things mixed up sometimes, based on their own assumptions and backgrounds. These are online at:
http://reference.bahai.org/en/