I think its because many russians doesnt know much about other Western countrys like Norway,Canada,UK,Denmark,Austria etc. So they think that Germany and USA is best countrys in the world. (Germany is not bad country, but still not best in the world according GDP per capita)
( en.wikipedia.org/wiki/List_of_countries_by_GDP_(nominal)_per_capita )
They know something about Germany because of german cars that popular in many countrys and WW2 history. Also many jews and russians with jewish ancestry migrating from Russia to Germany. So russians have jewish friends that talking to them how Germany is good. Its like ppl in African countrys that wearing t-shirts with american flag.
(sry for my bad english)