Yes you have to laugh at the irony of the situation. Europe is indeed in danger of becoming swamped under the tide of Islamic Imperialism, it is about time the Church responded. With African missionaries? LOL oh the irony ;-)
I find it interesting that the Church seems to be having more success in Africa than many other Western institutions, so yes black African Catholic missionaries being sent to Europe to stem the Islamic tide in France and elsewhere would be ironic eh? ;-)
How likely is a black African like Cardinal Arinze to be chosen THIS conclave? I'd think a Latin American pope might be more likely right now [increasing Protestant evangelism in Latin America may seem a more immediate threat to the Church to address with a Latin American Pope] but I think it may well happen eventually, and it would be quite ironic indeed if by that time Europe has become thoroughly Islamicized while Africa has become the bastion of the Church...hey maybe there's an sci-fi or 'alternate history' story in there somewhere; African Crusaders fighting their way NORTH to reclaim Rome for the Faithful? ;-)...lol.