Amid heightened tensions over ISIS-fueled terror attacks and anti-Muslim rhetoric, a prominent U.S. cardinal says Islam “wants to govern the world” and Americans must decide if they are going to reassert “the Christian origin of our own nation” in order to avoid that fate.

Cardinal Raymond Burke, a Rome-based prelate known as an outspoken conservative and critic of Pope Francis’ reformist approach, said in an interview on July 20 that Islam is “fundamentally a form of government.”

While Catholic teaching recognizes that all Abrahamic faiths worship the same God, Burke criticized Catholic leaders who, in an effort to be tolerant, have a tendency “to simply think that Islam is a religion like the Catholic faith or the Jewish faith.”

But he said he worries that many people do not understand that, in his view, “when they (Muslims) become the majority in any country they have the duty to submit the whole population to Shariah,” as the Islamic code of law is known.