"It is hypocritical for the United States and the international community to say that they believe in freedom and equality, when their actions do not support those who are being persecuted," he said.
Oritsejafor also rejected the idea that Boko Haram is "fragmented and disorganized."
"Since its creation, the Boko Haram network has never hidden its agenda or intentions," he explained, adding that the group, whose name means "Western education is sinful," openly rejects the Nigerian state and seeks to impose Shariah law.
"To this end, Boko Haram has waged a systematic campaign of terror and violence," he said. "They seek an end to western influence and a removal of the Christian presence in Nigeria."
With an increasing rate of terrorist attacks against Christians, Boko Haram "is not only a northern problem, but a Nigerian problem with global implications," Oritsejafor observed.
He pointed to an attack the previous weekend that left 58 people dead in Christian villages in Jos, an attack for which Boko Haram has already claimed responsibility.
"This is outright terrorism, not legitimate political activity or the airing of grievances," he insisted, adding that it is "only a matter of time" before the militant group attempts to bring its extreme agenda to the United States.
Oritsejafor urged the U.S. to lead the international community in taking action, warning that as Boko Haram "increasingly turns towards genocide" against Christians, "history will not forget the actions or the inactions of your great nation."
Michelle La Rosa is deputy editor-in-chief of Catholic News Agency. She has worked for CNA since 2011. She studied political philosophy and journalism at the University of Dallas.