Russia sees the secular, humanist EU as ground zero for this spiritual malaise and Ukraine's flirtation with the EU as inviting disaster.
Russkies have the highest abortion and divorce rates in Europe. They also have high levels of alcoholism. Only 1 to 2 percent of the population even bothers to show up to their church on an Easter. Statistically speaking they are also not very bright, and have a life expectancy not too far above people who live in third world countries.
Russkies are moral degenerates, and when they call other countries "decadent," they are only angry because those countries are probably cleaner and more decent than Russia.