Statistics show that Jews are more than 10x less likely to engage in consanguineous marriages than Arabs. Doesn’t mean that you are sleeping with your mother or sister but there is a huge tendency for Arabs to keep it in the family at the level of 1st or 2nd cousins. I would not presume to attribute your limited intellect and extreme bias to genetics. I suspect it’s self inflicted.
Your racist Arab bigotry is showing. Most Israeli Jews were expelled from Arab countries. Most Gazans came from other Arab countries as well, principally Egypt and Saudi Arabia. Regardless of their origin your desire to “solve” the “Jewish problem” though ethnic cleansing and extermination reflects the genocidal xenophobia and illegitimate nature of the Palestinian “cause”. As both Jamal and his cousin Haj Amin Husseini, early Palestinian nationalists, echoed racists such as the Klan and Nazis, the presence of Jews in Israel disturbed the “racial homogeneity of the Arab world”.