Stick you antisemitism whataboutery up your arse for a start.
If you want to go down the road that people in US intelligence knew about 9/11 before the attack, it is quite clear they did.
https://www.sfgate.com/bayarea/matier-ross/article/Willie-Brown-got-low-key-early-warning-about-air-3314754.php
Reported at the time, San Francisco Mayor Willie Brown was told not to fly to New York on the 9/11.