I think to rephrase the question as "would we exclude dating someone based on their race?" may get to the bottom of some of the murky waters because if inherently the answer to that yes then you have decided that race is a defining factor on finding someone attractive, your prerogative of course.  I'm a white guy who has dated many "races" in a weird way I suppose a culture clash sometimes makes things more interesting, more to learn from, but some people click and some don't, but even so, a culture difference is not defined by being of a different "race".  The culture or colour of a person SHOULD not be deemed as an appeal nor a turn off.  Its simply just who we are in appearance.  Having said that, its quite alright for me to sit here and state my opinion, but I'd be a hypocrite if I said I always practiced what I preached, because the culture or colour of a person can certainly be an appeal, but never has it been a turn off.