My father, who was in the Pennsylvania National Guard, has a different recollection of Pittsburgh in the late 60’s. Especially in Pittsburgh’s Hill District.
Your father's recollection is probably from riots in the Hill District and Homestead that flared for three days starting on April 6, 1968 in response to the assassination of Martin Luther King.
I grew up in the housing projects in the Hill District in the early 1960's, where my father along with many other Pitt students had housing. Those housing projects have since been torn down.
Don't you feel guilty. Let people have their confabulations. Pittsburgh was a fuzzy bunny rescue center in the late 60s.