The point that when one talk about Catholic or Protestant countries it does not mean that it is actual religious Catholic or Protestant people doing it.
it is the philosophical and cultural background that the religion bring to the country and its political system.
in Germany there is very few religious people. But the structure of the state is configured in base to the old Prussian structure that was influenced by Protestantism.
There are Catholic in Germany in Bavaria but they didn’t influence the rest of the country./
you can see that countries influenced by Protestantism are more active in fighting Russia than countries influenced by Catholicism, with the notable exception of Poland.
In reality, Prussia was much more compatible with Russia. Germany today is under US occupation and has no policy of its own. If the US power over them falls, Germany will quickly become Russia's friend again, as many Germans had good relations with Imperial Russia in the past, including the Russian nobility being partly German.
The separation between Russia and Germany was plotted by the extinct British Empire diplomacy and continued today by the US, because a possible economic and political union between Germany and Russia would destroy the Anglo-Saxon power in Europe, which only survives by dividing others to reign, the old model of the Roman Empire.
And in fact, Prussia was not exactly Protestant, on the contrary it was pragmatic.
Prussia by decree unified the Lutheran Church with the Calvinist Church by force into a new national Church, and Lutherans and Calvinists hated each other and disagreed about many things. Prussia also tried to unify the Catholic Church into this new church, but it failed and Bismarck had to make a deal with the Pope in the 19th century.
Prussia had an approach to religion very similar to the Russian Empire and the Orthodox Church.