Indeed. We need a conservative Pope who will require Catholic couples to have as many children as they are able to safely bear, and who will also advocate for an immigration policy for Europe that would preferentially accommodate Christians, and also, launch aggressive evangelization efforts in Bosnia, Albania, Central Asia and certain other places, such as Ghana in West Africa, where the Muslims are not particularly devout and where radicalization is uncommon. Also, I believe the Kurdish people, particularly the Yarsanis and Alevis, and the Bektasi Sufis, are ripe for conversion.
The Yazidis are a bit more of a challenge due to their strict endogamy although if one could get to Baba Sheikh, their spiritual leader, and follow a planned conversion process that would begin by stressing the numerous Christian and crypto-Christian aspects of their religion, it could be done; it helps that Yazidis like Christians and dislike Muslims and are clearly descended from a heretical Christian sect, and also that they lack any widely distributed scriptures, the two religious texts attributed to them being regarded as forgeries.
At any rate, a conservative Pope needs to exert maximum pressure on his flock to increase the birth rate in areas where the ratio of Christians to Muslims is declining.
Fortunately, among Copts, Maronites, Syriacs, Assyrians and Chaldeans, and also among the Mar Thoma Christians who have been present in India since the 1st century, and other more recent Indian Christian populations, both in their homeland and the diaspora, the birthrate is high; ironically these are also some of the populations most at risk for genocide, but they will not go quietly into the night. What is needed is for Western European Christians to increase their birthrate in response to the recent influx of immigrants.