The house rules of Habsburg-Lorraine actually dissuaded incest except for one niche bug case where it was beneficial at the very very top. In every other case but that one there was no point and in fact doing so limited political and social benefits so you missed out if you allowed it. Jews hate the habsburgs but if you look them up and not just the few ugly ones used by jews to push the myth you see that many had underchins and other features. Hungary is white now because of them and their influence and heritage is a large part why they have "far right" running it. The current house head is a far right politician in austria