I did google as you suggested. Elvis is hated mostly by Whites who hate his love of Black music. Elvis was not Pat Boone. Elvis did not do safe White covers of Black songs. He did not refrain from shaking his pelvis. He was praised by BB King, Little Richard, Ivory Joe Hunter, Fats Domino and others. Elvis ended the segregation of music, his audiences were mixed races, and the barriers that barred Whites from liking Black music performed by Blacks came down because of Elvis.