vatican city pope francis strongly defend immigrants christmas eve mass sunday compare mary joseph find place stay bethlehem say faith demand foreigners welcome francis celebrate fifth christmas leader world 1.2 billion roman catholics lead solemn mass 10,000 people st. peter basilica many others follow service square outside security step participants check approach st. peter square even go metal detectors enter basilica square clear hours early security procedures could put place gospel read mass christendom large church recount biblical story mary joseph travel nazareth bethlehem register census order roman emperor caesar augustus many footsteps hide footsteps joseph mary see track entire families force set day see track millions persons choose go away drive land leave behind dear ones francis say even shepherd bible say first see child jesus force live edge society consider dirty smelly foreigners say everything generate mistrust men women keep distance fear wear white vestments flower-bedecked church francis call new social imagination ... none feel room earth 81-year-old pope bear italian immigrant stock argentina make defense migrants major plank papacy often put odds politicians austria new chancellor sebastian kurz align central european neighbor like hungary czech republic oppose german-backed proposals distribute asylum seekers around eu member state elections germany september far-right anti-immigrant alternative germany afd party make significant gain electors punish chancellor angela merkel open-door policy push migration policy top agenda talk form coalition government italy anti-immigrant northern league whose leader matteo salvini often give fiery speeches migrants expect make gain national elections next year law would give citizenship children bear italy migrant parent stall parliament homily francis say document citizenship come god make respect migrants integral part christianity joy tonight call share celebrate proclaim joy god infinite mercy embrace us pagans sinners foreigners demand francis say francis also condemn human traffickers make money desperate migrants herods today blood hand reference biblical story king order kill newborn male children near bethlehem fear jesus would one day displace 14,000 people die try make perilous cross mediterranean europe past four years christmas day francis deliver twice-yearly urbi et orbi city world bless message central balcony st. peter basilica fourth paragraph story correct say mary joseph mary jesus pope christmas eve say faith demand respect immigrants