Discrimination against Catholics and nonconformists, attempts by the British administration to suppress Irish culture, and the belief that Ireland was economically disadvantaged as a result of the Act of Union were among the specific factors leading to such opposition.
Diskriminace katolíků, pokusy britské správy potlačit irskou kulturu a víra, že Irsko bylo ekonomicky v důsledku Dohody o unii z roku 1800 znevýhodněno, byly hlavní faktory vedoucí k této opozici.