Part of the reason (certainly not entirely, as academia has seemed to attract leftists more often) may be that our teachers and professors are being PAID to spout propaganda by <gasp> foreign interests that don't necessarily have our well being as a nation at heart?
http://pajamasmedia.com/blog/anti-ameri ... ress-this/Anti-American, Foreign Donors Are Paying Off Our Profs. Shouldn’t We Address This?
Adversaries have been buying sway in Congress and the public eye by funding American professors who advocate for them, to the tune of $600M.
"We will bury you!" may not have been empty words by Nikita Khrushchev after all- especially if foreign interests get a say in how our youth are educated- or rather, indoctrinated.