Intergroup marriage is exemplary of asymmetrical attitudes toward establishing in-group/out-group bonds. Members of higher-status ethnic groups are always more opposed to intermarriage with someone in a subordinate ethnic out-group than the reverse. Marriage downward in the social status hierarchy is frowned upon.
Euro Americans oppose marrying Asian Americans more than Asian Americans do marrying Euro Americans. Similarly, Asian Americans are more mortified at the prospect of marrying black Americans than the converse.