If you were to judge Asian women purely on looks, they might feel like they belong to a different class, but more often than not, they are using the 'white' guy to escape the grinding nature of their poverty and a pretty cruel life back in their hometown.
For folks with a western upbrinding, they also seem to like the calm, obedient, slightly docile nature of asian women - though i believe education and other opportunities are making them more outspoken and discerning than before.
If you find yourself dating someone - and sense stigma from friends, relatives etc ignore them initially till they get used to your partner/gf/bf etc. As time goes by, folks come around. It's really difficult to hold a grudge or stigma for a long period of time.