Nor anybody else's position for that matter
As you suggest we need to be sensible about these things. When I was a boy I can remember reading the Victor and the Valiant - and I can also remember playing warlike games and having toy soldiers (the enemies were always the Germans - strange to think were I ended up !). So maybe I should have been sent to a de radicalization centre (although SH. probably thinks that I should be now !). Boys will be boys - more serious would be if a boy suddenly started not speaking to, or not even acknowledging female teachers - as has happened to my wife on a few occasions, because this would suggest a radicalization coming from the parents.
Cologne, you are definitely a suitable case for treatment
When we lived near Toulouse we became friends with a super german couple that lived opposite. My daughter, being quite young at the time, was very fond of Wolfgang and Martina but having just watched the Sound of Music on video she was concerned when she became aware that they were actually german. Obviously these doubts soon passed. The International school in Toulouse, owned by airbus, was a great place for all to learn to mix with many different nationalities, especially to teach the young to become europhiles.
Despite the slurs of being called 'little englanders' it is perfectly natural to be a europhile, like myself, but want sovereignty for the UK.