Sentence:  Some critics have maintained that (unlike modern nationalism, which is a creation of the 19th century nation state) authentic nationalism (as the Latin 'natio' would suggest) must be based in some form of <WSD>genophilia</WSD> and the sharing of ancestors in which sense The Vatican does not qualify as a nation-state since membership of Catholicism are scattered all over the world with no possible ties of ancestry pedigree. 
Meaning of the word marked with <WSD> tags:  Love of one's own relations, tribe, kind or race.