In general you can sometimes get insight from the "Talk" section for these kinds of questions.
In this case, there was a "historical inaccuracies" section which was removed due to sourcing concerns. Not sure how well it holds up to what is (/was was the time) up on the German one.
Sometimes it can be up to chance or culture, sometimes editorial differences.
EDIT: Come to think of it, in this case maybe the German Wikipedia just has misproportionate coverage and activity for its speaker-base (this would certainly fit with my preconception)? I recall reacting to pages on topics from other countries where I'd be surprised to find it covered in German and not the native language,
In this case, there was a "historical inaccuracies" section which was removed due to sourcing concerns. Not sure how well it holds up to what is (/was was the time) up on the German one.
https://en.m.wikipedia.org/wiki/Talk:JFK_(film)/Archive_1#Qu...
Sometimes it can be up to chance or culture, sometimes editorial differences.
EDIT: Come to think of it, in this case maybe the German Wikipedia just has misproportionate coverage and activity for its speaker-base (this would certainly fit with my preconception)? I recall reacting to pages on topics from other countries where I'd be surprised to find it covered in German and not the native language,