If he was wearing socks with sandals he was probably a German tourist.
You’re right about the German tourists wearing socks with sandals-a few come and stay at the guest ranches in the Summer here-I’ve seen them in our little restaurants and tourist traps-they are easy to spot-the footwear, and the fact that they are mostly silent and always reading something-at a restaurant table, waiting for a table, in a bar with a beer in front of them-doesn’t matter how much music/conversation, etc is going on around them, they are totally still and uninvolved-makes you wonder why they came to a tourist area in the 1st place...