I graduated college in May 2014. When did this culture begin?
I don't remember the term safe space or trigger warning being used when I went to school and my school was overwhelmingly liberal.
We didn't have fraternities or sororities either. So I don't know.
Maybe I was just in a bubble.
Graduated in '12 from UW in Seattle - not exactly a right wing stronghold. I don't remember any of this either, you're not alone. I do sometimes get the sense that this is especially prevalent on private, exclusive campuses i.e. Yale, Dartmouth, Wesleyan etc. I'm sure it happens at big public universities too (see: Missouri) but it seems to be particularly prevalent at private liberal arts colleges.