Native Hawaiians (Hawaiian: kanaka `oiwi, kanaka maoli, and Hawai`i maoli) are the aboriginal Polynesian people of the Hawaiian Islands or their descendants. Native Hawaiians trace their ancestry back to the original Polynesian settlers of Hawaii. According to the U.S. Census Bureau report for 2000, there are 401,000 people who identified themselves as being "Native Hawaiian" alone or in combination with one or more other races or Pacific Islander groups. 141,000 people identified themselves as being "Native Hawaiian" alone.

In the early 2000s, the Congressional delegation of the State of Hawai`i introduced the Native Hawaiian Federal Recognition Bill, beginning the process of recognizing and forming a Native Hawaiian government entity to negotiate with state and federal governments. The significance of the bill is that it would establish, for the first time in the history of the islands, a new political and legal relationship between a Native Hawaiian entity and the federal government. This Native Hawaiian entity would be a newly created one without any historical precedent in the islands, or direct institutional continuity with previous political entities (unlike many Native American Indian groups, for example).  This bill came under scrutiny by the Bush administration's Department of Justice, as well as the United States Senate Judiciary Committee. The political context surrounding the Akaka Bill is both controversial and complex. Proponents, who consider the legislation an acknowledgement and partial correction of past injustices, include Hawai`i's Congressional delegation, as well as the former Republican Governor, Linda Lingle. Opponents include the U.S. Commission on Civil Rights, (who question the constitutionality of creating race-based governments), libertarian activists, (who challenge the historical accuracy of any claims of injustice), and other Native Hawaiian sovereignty activists, (who feel the legislation would thwart their hopes for complete independence from the United States).  A Ward Research poll commissioned in 2003 by the Office of Hawaiian Affairs reported that "Eighty-six percent of the 303 Hawaiian residents polled by Ward Research said 'yes.' Only 7 percent said 'no,' with 6 percent unsure ... Of the 301 non-Hawaiians polled, almost eight in 10 (78 percent) supported federal recognition, 16 percent opposed it, with 6 percent unsure." A Zogby International poll commissioned in 2009 by the Grassroot Institute of Hawaii indicated that a plurality (39%) of Hawai`i residents opposed the Native Hawaiian Reorganization Act of 2009, and that 76% indicated that they were unwilling to pay higher taxes to cover any loss in tax revenues that might be incurred by the act.

Why did they opposed?
they were unwilling to pay higher taxes