the majority of students are gentiles, and the majority of the Jewish students are unfortunately not religious, etc. It is impossible for a student to avoid contact with fellow students and professors. Hence, even if your son would have liked to go to college, it would have been highly problematical as to the advisability of it, as it is impossible to foresee what conflicts and dangers it would entail.

https://www.chabad.org/therebbe/letters/default_cdo/aid/1877091/jewish/Rebbe-Please-Convince-My-Son-to-Go-to-College.htm

Encouraging Jews not to hear information from Goyim for brainwashing