[olde north church]

The "They all look the same to me" is found within each race. It's know as ethno-centric sympathy. GENERALLY whites look the same to blacks. I have a friend who is Chinese, he was able to tell the difference between Japanese, Korean, Thai, but not able to tell the difference between Irish, Italian, Hispanic.
It's very important to know who is who down at the watering hole.

[Pharmboy]

Exactly. It is important to distinguish "other" among people that look similar to you down to the subtle differences in jaw or nose shape; but when they are CLEARLY not of your "tribe," futher differentiation is unnecessary.