South London Beers: Reboot - Last Thursday of the Month at The Prince Regent, Herne Hill, SE24

To be serious for a moment, Claire, Jack's outfit bears no resemblance to a Hitler youth outfit, which was chiefly characterised by the "Braunhemd", or 'brownshirt'. Imagine this scene in colour, with the shirts a light khaki brown:

It's not his outfit, it's the look in his eyes...