Are all Hispanics considered under represented minorities (URMs)

White Hispanic here. Denied EA to MIT with following stats: SAT 2280 BIO 740 Math 730 ACT 34 and GPA 3.9 school does not rank
Look at percentages. WashUSL just over 4% Hispanic population and looking to increase #. LACs have much higher population too than Ivies and looking to stay that way. (Amherst 12%) Rhyme or reason unknown; each school has own reasons.