They're really not. Europe is diverse enough that you need to split it into quadrants to decide what countries are relatively similar. Like is Finland similar to Germany from an outside perspective? Yes. Is Finland similar to southern Italy? Absolutely not, you'd be better off comparing southern Italy and latin America, and Finland with Japan. Like seriously, those will have more in common with each other than Finland and southern Italy. People have told me Naples feels like Brazil... which is nothing like Finland, which has the orderliness and cultural restraint of Japan. North European,East European and South European countries are similar to other countries in those same segments of Europe. They are not similar across segments.
"Europe is diverse enough that you need to split it into quadrants to decide what countries are relatively similar"
The same is true for South Asia, but if you look at it from a western perspective you see the similarities.
There are plenty of similarities across Europe. Shared attitudes to sex, politics, religion..... things like freedom of worship and separation of church and state (laws restricting freedom of worship even in secular democracies like India, let alone the Middle East or China), attitudes to sex and sexuality (and ideas and definitions and identities linked to them - although this is changing because of Western influence, historically the idea of people having a fixed sexual orientation is a modern western one, for example)....
I dunno how what you're saying negates my point. I was actually gonna add that the same thing can be said of Asia, which even more so needs to be split into quadrants to find clear similarities in culture.
