Anyone posting Deus Vault is out of CK3 is posting speculation not fact.
On July 10th, user TheBigGay submitted a gallery of referencing the Crusades and "Deus vult," which reached the front page of the subreddit two months later shown below.
Give the matter a rest and dont perpetuate speculation.
I mean it was the smallest but most important DLC.
We have not specifically considered which terms are used in the game apart from making sense in the historical context.
As mentioned, it's a decent game, but as a proud owner of the first Crusader, I'd never lower myself to play the 2nd after having tried it out.