In this case I also generally agree (de Medici is ridiculous choice for France, though still not as bad as Maria of Portugal in civ5
).
However, on youtube - where almost every First Look video gets 2-5% dislike ratio - First Look Nubia got 25% dislike ratio, with all critical comments being about its leader being obese black woman! Go on, see them and tell me they are not madness. This is genuinely the only concern of those people: that there is a civ with fat, black woman as a leader and that means firaxis makes "leftist propaganda". Also, a ton of those comments suddenly turned out racist and suggesting Subsaharan Africa never had any civilisations.
The same kind of people would be offended by the existence of female Muslim leader.