I don't think anybody said that political bias hasn't existed in previous times, and I bet I started school before you did, DTOM
I spent the first 10 years of school in a rural Bible belt, ultra-conservative little town and the last two years of highschool in Santa Fe which I think was then and still is the most liberal place in the Southwest. My undergraduate higher education was in a small rural redneck Bible community complete with a nativity scene on the courthouse lawn, rigid blue laws, and in the middle of a bone dry county. Nevertheless we had a marvelous mixture of conservative and liberal professors and were exposed to just about everything. One of the most praised pieces I wrote for the college paper was covering a Russian communist who was invited to lecture--his lecture was very well attended too.
I was pretty liberal myself in those days and did not feel the least bit coerced or intimidated by any of my quite conservative professors nor do I think my more conservative classmates were bothered by the really liberal types in the art, music, and sociology departments.
That's the way I want it to be now for me, my kids, my granddaughter--a good mixture of all and exposure to all ideologies, and instruction on critical thinking about everything. One thing that was not tolerated at any school I ever attended in those days--knee jerk responses were viewed very negatively. When we came up with our opinion, we jolly well better have thought about how we arrived at it.
I remain convinced that the preponderance of evidence we have so far suggests that students in public universities today are not getting that kind of education.