I surely agree that we shouldn't generalize people, I'm my self not typical indonesian mainstream ( I don't always mingle much in a group and prefer to have more privacy for example :-D ).
Neverthless, at some point there are definitely something which can be said as common /typical characteristic of people from particular country because it also has something to do with the upbringing style, the culture and how the society there works.
Generalization is sometimes necessary and has to be done in some particular aspect/for some certain needs.
But anyway in this case I think you misunderstood my point a little bit.

Regarding this sentence:

We know that Germans tend to keep a proper distance to strangers

I didn't actually mean it in a negative way :). I was merely talking about the difference between German and people in Asia or even Spain when it comes to a "safe distance" between persons in order to keep each of them feel comfortable,
especially towards those who are still considered just acquaintance..let alone towards strangers.
Well... at least when the circumstance and place allow them to keep that "safe distance".
The safe distance among German who barely know each others is definitely further than Asians.
So it's more about physical distance.
I'm talking about how you wouldn't expect germans being touchy feely with others who isn't in dating relationship. It's just weird :-D.
But it's rather different in Asia 😉.