It's total bullshit. But considering the historical impact of their previous titles (aka zero), Ubisoft can spout whatever lies they want, i.e. no one cares. Their teams of "religiously diverse gender bender" virtue signallers are some of the least qualified to correctly portray European history, that's for certain.
I'm sure the game will have its redeeming qualities (because Ubisoft does employ some talented devs who know how to make fun gameplay), but the "bigger historical picture" will be shit, as per usual.