Who would the average white man from let's say the 60's have rather sat next to and socialized with at a bar.. A poor white man or a black man.
The average white man in the 60's would probably not have socialized at a bar with "backwards white trash" or Negroes. It wasn't a decison being forced upon people at the time.
Whites with money avoided crap white schools before they were integrated just as they avoided crap integrated schools. Those without money moved to a better district.
Honestly, I've never "hung out" with
"backwards white trash" or Negroes around a camp fire, except perhaps in the Army.
Perhaps I don't understand who you are calling "backwards white trash", IMHO simply being poor does not make one trash.
Sure society is more integrated and diverse, so a functional white person is more likely to come in contact with people they would previoulsy avoided under some circumstances.