The vast majority of Muslims in America and the rest of the world consider NOI to be a joke.
From Wikipedia: The main belief of The Nation of Islam and its followers is that there is no God but Allah. However, they redefine “Allah” by saying “who came in the person of W. D. Fard.” Fard founded the Nation of Islam and subsequently installed Elijah Muhammad as the organization’s leader. Their teachings are heretical by traditional Islamic standards which abhor the deification of any person, or the anthropomorphization of God.
NOI is a fringe religion. Using the Farrakhan endorsement as a “connection” to tie Obama in with fundamental Islamists is ridiculous. (And yes, that is the implication made here…)
Farrakhan does not speak for Obama and he certainly is not a part of the Wahhabist movement responsible for attacks on the US. Again, that’s the implication of raising these “concerns” about Obama’s connection to anyone or anything Islam.