"Others like her are used as human shields, sex slaves, or bargaining chips for ransom from government and international organizations," he said.
"The forceful abduction and conversion of underage Christians girls is real. On the other hand, Muslim girls who freely choose to marry Christian men face threats of death."
Archbishop Kaigama spoke at a virtual event organized by Aid to the Church in Need UK for "Red Wednesday."
Aid to the Church in Need began the annual Red Wednesday initiative in 2015 to draw attention to the plight of persecuted Christians around the world by illuminating in red major landmarks, such as the Colosseum in Rome and Westminster Cathedral in London.
At the event, the Nigerian archbishop appealed for support for his community as it struggled with the attacks of Boko Haram and other groups.
"Western nations need to pay the same attention to this reality as they vigorously do in their countries in the case of the COVID-19 pandemic," he said.
"The Christian-dominated Middle Belt and some parts of northern Nigeria will have no future if groups like Boko Haram and allied terror groups continue to harass them."
"The U.K. and other nations with Christians roots should speak and act more in favor of freedom in northern Nigeria."
Kaigama said that the United Nations, the European Union, and key countries like the United States could also do more in sharing strategic intelligence and give more technical support in the face of these terrorist threats.
"We are united in prayer and action for Christians unjustly detained for their faith. We strongly urge that they all be set free," he said.