considering that liberalism is essentialy a liberty based political view, those who call themself liberals nowadays are just a "special" form of socialists, indeed, cause they consider state power as tool of social progress, and i'd suggest concentrating on this aspect: using state authority to make a change is like asking god on earth to make things better. Missdirected, naive and with disastruous effects: both liberals and socialist (with all their subspecies) do this. (maybe exept the anarcho-socialists...but they are as useless, considering other aspects)
(institutionalizing christian beliefs is evil, not the christian belief in itself, wich, as any spiritual point of view, is optional.)