This is also happening in our local/hosted organizations filled with wazungus/expatriates. I remember driving into one such organization, the g4s guard at the gate was inspecting my id and the car like it was potentially explosive. A minute later a white guy drives in and he is just given casual inspection and asked to drive in! Actually at US ports of entry is where ur constantly reminded of ur foreigner status by those huge signs of USA citizens only and then others!
One's first step in wisdom is to question everything - and one's last is to come to terms with everything