@clacke @Azure The romans used to complain about the fact that germanic barbarians used to drink wine straight instead of mixed with water: I'm not sure how much of that was based on truth and how much it was just a way to say that they weren't civilized.
If it was true, then it's pretty much likely that the crusaders and Venetians, coming from elite classes that descended from germanic conquerors, also drank straight wine.
On the other hand, it could have also been the greek speaking romans keeping alive the tradition of accusing people of not being properly civilized.