Why is people afraid of the fenians?

People may fear the Fenians due to their association with nationalism and the desire for Irish independence from British rule during the 19th century. The Fenians, particularly the Irish Republican Brotherhood, were known for their willingness to use violence and revolutionary tactics, which contributed to a perception of them as a radical threat. Additionally, the sectarian tensions and historical conflicts between Irish Catholics and British Protestants fueled fears and misunderstandings about their motivations and goals.