This is not 100% correct. Baha’is have many groups that hate them and write dismissive articles such as these. Take a look at what Baha’is have done in countries fighting for human rights — and that is every right
Well, in Iran the Islamic Republic feels threatened by Baha'is. Most people that hate Baha'is is because they feel threatened by them. For example, Baha'is have no clergy. So all clergy will naturally feel treated as the Baha'i population grows -- that's just an example