Missionary Groups Adopting Muslim Orphans
Question

                What is the Islamic ruling Islam on missionary groups adopting Muslim orphans? Can you give us evidence (daleel) concerning that?
Praise be to Allah.It 
          is not permissible to hand over Muslim orphans to the non-Muslims, Christians or others, because of the great danger that this poses to the orphans, 
          and because they will not be given an Islamic upbringing. They (orphans) 
          are a trust (amaanah) for which the Muslims are responsible, so it is 
          not permissible to place them under the guardianship of anyone else. 
          Allaah says (interpretation of the meaning): 
“The believers, men and women, are Awliyaa’ (helpers, 
          supporters, friends, protectors) of one another” [al-Tawbah 
          9:71] 
 “And 
          those who disbelieve are allies of one another, (and) if you (Muslims 
          of the whole world collectively) do not do so [i.e. become allies, as 
          one united block under one Khaleefah (a chief Muslim ruler for the whole 
          Muslim world) to make victorious Allaah’s religion of Islamic Monotheism], 
          there will be Fitnah (wars, battles, polytheism) and oppression on the 
          earth, and a great mischief and corruption (appearance of polytheism).” 
          [al-Anfaal 8:73]