Be fair - the Jonathan comparison is primary source canon, and it’s the Küstrin garnison preacher who first made it! (In that description where Katte is looking for Fritz “his Jonathon”, which also makes FW Saul.) (Same preacher who reassures Hans Heinrich that his son is now with the angels before God’s throne, etc.)

(This said, no budding Nazi writer in 1914 can claim innocence to the Jonathan comparison, especially if he’s going to all this trouble to hook up Katte with Michal, err, Wilhelmine.)