I'm pretty sure @Moich is a Jew or a cac, probably both.It's actually much easier to pick on Libya than it is Israel, not that I would describe it as them being 'picked on'.
Libya is a failed state, and the slavery going on isn't state sanctioned, cutting diplomatic ties wouldn't have any bearing on it.
Libya isn't doesn't have the biggest slave trade in Africa either.
Lastly, South Africa has it's own problems in terms of dealing with African immigrants.