I will not even talk to you about your first part. Us Jews, and particularly Ashkenazi Jews, are factually the people with the highest IQ on average, more than any other ethnic group anywhere in the world, you are in no position to call us low IQ.
View attachment 806629
China definitely had a lot to do with the IAI Lavi.
I have no idea about the details, but the Lavi had an advanced fly by wire system, advanced (for the time) Elta radar, jamming systems, Heads Up Display, mission computer, internal navigation system, integrated the Python 3 (Which China also purchased from Israel in 1983, ), all of those were developed and built in Israel.
Israel has wind tunnels and tested the Lavi with them
The IAI Wind Tunnels Center is a National Center aimed to enhance the development of airborne platforms that comprises three state-of-the-art wind tunnels - the Subsonic, the Trisonic and the Hypersonic tunnels, covering velocity range from 0 to 12 Mach.
The IAI Wind Tunnels Center has over 40 years of experience in performing a variety of Aerodynamics Tests for civil and military programs, including the LAVI aircraft, the Arrow & Barak Missiles, the G-200, G-280 business jets etc. performed by our experts and experienced team that is obliged to the most accurate results.