I understand. However, he was the president for 8 years. In all that time, did any of his family EVER visit? I don't think so. So why not? Obviously, Barack's half-brother can't stand Barack. Of course, that happens in many families. Nevertheless, the definite impression given is that Barack's family has no love for the guy. Obviously, they know what a snake he really is.
The definite impression that your Obama haters have is that he is the anti-christ.
Barack Obama was raised by his mother and his maternal grandparents- he met his father only once after he was a baby. You are referring to his paternal relatives he only met for the first time when he traveled to Africa.
But even so- he is close to some of his half and step relatives from Africa- and not of others.
Barack's half sister on his mom's side is close to Barack- they were mostly raised together- she was at the inauguration and even moved to DC
Obama’s Sister Is Coming to Washington
To the left of the president, next to Malia, stands Akinyi Manners with her mother, Auma Obama, the president’s paternal half-sister. On her left is Obama’s maternal half-sister, Maya Soetoro-Ng, with her husband, Konrad Ng, and their two young daughters.