PaulinThailand, I'm no offical on this but I would respectfully suggest it has something to do with the fact both have or have been made to feel like an outsider (within a country where they were born & raised) due to thier colour thus given them a commonality..... also if that is almost word for word example the use of "brown" then black already points towards a level of juvenility. ;-)

Personally I dont get upset by comments made about race or religion (although I'm not really religious!) when they are made with a level of respect or at least are meant without disrespect.
Its the negitive sweeping statements that generally get peoples backs up..... eg blacks smoke weed, asians smell of curry, white people cant dance..........



Hold on I think that last one is true isnt it!??? lol lol lol