I just slipped over this thread...
As far as I know, there has not been an official demand from geobra to stop showing modern military customs. But I remember an occasion some months ago (still at playmo-portal) where a guy posted WWII-customs with explicit display of nazi-emblems, which is even forbidden by german law.
The new rule that modern military is banned in klickywelt is ongoing, a final decision has not been made now. Bennain just stated this ban to start the discussion.
I am by far not a friend of military customs and I am definitely happy that playmobil do not sale a perfectly designed tank for children to play. Modern war here in germany definitely has a different impact. I would not say that all the germans are pacifists, but most have a very distinguished view on war as a game. I personally appreciate this attitude very much!
Everything else, I think, is kind of a personally decision someone has to make. The values are just as well different for people with different backgrounds. Just remember the initiative of the Malaysian (?) government to ban the playmo pirate ship from the market. What is seen mostly as a romantic, historic game, for those people is a very offensive toy, living in an area, where many people got killed by pirates every year.
But, just to make that clear, I agree that there are several brilliant customs adressing more or less modern military.
best,
socrates