a small piece of advice, treat people you don't know like people you don't know instead of assuming you know exactly how they'll react to anything you say. Be polite and treat them as you wish to be treated. It'll generate more positive reactions, usually, and if it doesn't, you cn blast away with anger later. The important thing is to first do the right thing, not to do wrong and apologise afterwards.
As a small remark of my own - Ofcourse this mod isn't 100% historically accurate. The complete range of politics, upheavals, regional dissent, rebellions (which are happening in the game as you play too) and seperatist movements is near impossible to put in. It would be impossible to put in every major town, city, fortification and important village, choices have to be made. Additionally, The same goes for names of places. Even in such a simple place like belgium, many places have two names - one in dutch, on in french. In the end, the dev has to pick one and stick with it and someone on either side of the choice is going to get insulted. Another choice is accessibility to players from different regions - some feel with the names would be nice. That you disagree with the choices doesn't make it a bad mod.