Not everyone working for a government is a diplomat, obviously. Only diplomats are diplomats.
I'm sure you are familiar with the concept of "diplomatic immunity". It means that the diplomat is not subject to the laws of the country he is stationed in. It's that status that also makes him not "subject to the jurisdiction" in regards to citizenship law.
Unless you can produce evidence that his father had dimplomatic immunity I'm afraid the that exception doesn't help you at all.
Even then, his mother was still a citizen, so Obama would have been too.
I provided evidence of his diplomatic work for kenya and a link.
He was never in the US as a Diplomat, rather in Kenya the entire time.
I do not claim the need for him to have diplomatic immunity from anything as I contend Obama was born IN Kenya.
His mother was not in the country long enough, under US Code, before he was born, for him to gain US Citizen status.
I contend he had Dip-omatic Immunity.
Kind of makes me think of the Bass-O-Matic, from Dan Akroyd.