White male with Asian female is a well known phenomenon. Somehow a certain grouping always tend to land a certain way. Such as getting heads 70% of the time when a coin is flipped. After it happens so much, people just expect it. They predict it.

Jeffie predicted correctly that your sister is with a white guy, and you were with a white guy.

You are whitewashed, but that's partly because of your environment. It's all you been exposed to is white people. You are just like those Aboriginal kids who got kidnapped by Australian colonizers and re-educated to the point you feel weird around Asians, hence you stated "it feels weird to just date Asian people".

News flash: Most white people only date/marry white people.

Asian Americans are screwed, especially Asian American males. We are never anyone first choice. I don't know why you are shocked at white people being racist at you, it's expected. Yes people do believe that Asian females with white guys are lower quality because the history of white guys with Asian females tend to be white guys who can't get white guys fly to Philippines or Thailand as sex tourists.