Many pluralistic nations are witnessing vigorous debate about multiculturalism. In the U.S., Americans generally embrace principles of ethnic diversity but dislike minorities who express strong ethnic identification. Two experiments examined this seeming contradiction by differentiating between ethnic identity expressed in private vs. public by non-White and White individuals. Then we tested whether individuals' identity expressions differentially affected perceivers' construal of their entire ethnic group as legitimately American. Results indicated that at a conscious level, White and non-White ethnic groups were held to the same standard and construed as significantly less American when members expressed their ethnic identity publicly vs. privately. However, at an unconscious level, a double standard emerged: non-White ethnic groups were implicitly rejected as less American if members expressed ethnic identity publicly, while White ethnics were implicitly accepted as legitimate Americans regardless of where they expressed ethnic identity.