That is pretty much where I ended up in the rabbit hole.  The incest and inbreeding leads to sexual degeneracy after a few generations.    The essentials of issue of degeneracy, Interview with Gregory Klimov http://g-klimov.info/Essence-e.htm  "Q. 01: You have been working with a special type of people with Power Complex for almost 50 years. What is Power Complex and why are these people special? A.: When close relatives marry each other – children will be degenerates. This is an old, well-known fact. If a group of religious leaders forbid marrying outside of sect – this sect in 4-5 generations will be full of degenerates. Do you know any sect, which forbids marriages to outsiders and has been doing that for the last 5,000 years? Many degenerates have some unusual qualities like incredible desire to dominate, abnormal wish to rule, abnormal thirst for power. They feel themselves “chosen” (complex of superiority, in russian "mania velichia") and at the same time they feel themselves persecuted (complex of been persecuted, in russian "mania presledovania"). This is pretty basic staff. Now we will talk Hi-Tech. Leaders of the world usually have complex of power which helps them to became world leaders. This complex is usually associated with suppressed sadism, which in turn is result of latent homosexuality. Anybody who has knowledge of this forbidden area can influence and promote these leaders-to-be to position of power. By default members of degenerative sect posess this knowledge and have been practicing it for 5,000 years."    John Kerry has the Habsburg Jaw.    https://www.smithsonianmag.com/smart-news/distinctive-habsburg-jaw-was-likely-result-royal-familys-inbreeding-180973688/