Complex sentence: In 2010, the Southern Poverty Law Center classified the FRC as an anti-gay hate group, a designation mostly opposed by conservatives who objected to the SPLC grouping violent and extremist organizations such as the Ku Klux Klan with the FRC.
Split into simpler sentences: In 2010, the Southern Poverty Law Center classified the FRC as an anti-gay hate group, a designation which has received opposition, mostly from conservatives. Opponents of the decision objected to the SPLC grouping violent and extremist organisations such as the Ku Klux Klan with the FRC.