Complex sentence: The paper's publisher and editor at the time, U.O. Clements, was a staunch conservative, but vociferously supported the racial integration of Lewisville Independent School District, for which he received many anonymous threats from members of the Ku Klux Klan.
Split into simpler sentences: The paper's publisher and editor at the time, U.O. Clements, was a staunch conservative, but vociferously supported the integration of Lewisville Independent School District. As a result, he received many anonymous threats from members of the Ku Klux Klan.