Actually, the Socialist and Anarchist movements were quite closely associated with each other. Both demanded huge social change and railed against the free market system (my term). On paper, one demands a huge centralized government, the other no government at all. In practice, they wanted to punish the rich and reward the poor...here is a bit about the assasination of president McKinley:


"A more dangerous element -- anarchism -- exacerbated the situation when it arrived from Europe. Anarchists brought a more radical philosophy to the scene, maintaining that any form of government exploited and oppressed the people. They believed that one way to combat government was to eliminate those in power. Since 1894, anarchists had assassinated four European leaders -- President Sadi Carnot of France, Empress Elizabeth of Austria, King Humbert of Italy, and Spanish statesman Cánovas del Castillo. In the United States, an anarchist had attacked industrialist Henry Clay Frick, in part for his role in the failed Homestead strike.

For some individuals with little or no formal education, few skills, and no hope of improvement, anarchism offered a natural outlet for their frustration. Cleveland resident Leon Czolgosz fit the profile perfectly. Poor, reclusive, and often unemployed, he had been born in Detroit to Polish parents in 1873. He left school after five and a half years and worked at various jobs and later drifted to Chicago and became interested in the socialist movement. The interest continued in Cleveland, where he took a job in the city's wire mills. Two weeks before he traveled to Buffalo, Czolgosz attended a lecture given by the nation's most notorious anarchist leader, Emma Goldman. She spoke of the struggle between the classes and why the time had come for action against government."