To start with, I am not expressing my own views here, simply raising an important feature of the medieval mindset. So there is ansolutely no intention to offend anyone of any of the groups mentioned below, and I repeat, these are not prejudices I personally hold.
So the order of Hermes spans from the western shores of ireland through to the Levant, across the holy land and into what we today call Russia. Now in the mundane world these people are not part of some jolly fraternity. Many of these groups positively hate each other. Others widely distrusted or even despised as an underclass.
Now, the only references I came across to, 'Hermetic pluralism' for want of a better expression, from memory was in relation to Jewish covenfolk where it is states that they could thrive in a covenant where they would have the same rights as others. That I can completely grasp and am very happy to extend that concept to believe the Order accepts everyone under a single set of rules.
Now... taking wizards as an example. An English wizard is still an Englishman. His French brothers in the order are still French. Does he lose his innate dislike of all things French as part of his apprenticeship? He may be bound by the same code and oath, but presumably he still doesn't LIKE them.
Now, that may be a bad example as I don't thin the true rivalry becomes a permanent feature of Anglo-French relationships for another century, but I think you get the idea. It also allows me to cunningly skirt around using more obvious examples of religious groups which might offend some members, and that is not my intention at all.
Do these national animosities feature in your campaigns. I thought perhaps these features might be show their ugly heads at places like the flambeau tournament and rivalries might form along these lines... similarly with Verditius vendetta.
If the order has truly eliminated these things, which it could well do I guess as part of the apprenticeship process, within its ranks... then I think it needs to be written up at some point as one of the great legacies of the founders. Sounds like something that could be attributed to Trianoma.