This is ignorant and wrong. Integrated communities date to before the founding of the United States. Frederick Douglas was a prominent and internationally recognized voice for equality and integration 100 years before the 1960s. We fought a civil war over it. Immediately following that civil war, there were strong legal protections created for the rights black Americans to own property, run businesses, vote etc. in an equal and integrated way. These protections were then chipped away down to Jim Crow levels through the sustained and vigorous efforts of racists who wished they had won the civil war and perpetuated slavery.

To be even more specific, you have authors who worked directly with Campbell during that time saying that they knew that he was racist and that it was wrong.

This idea that racism was normal and not remarkable in 1960s is a pernicious fiction that is promulgated by racists and their apologists. If you feel that this is an unfair inference about you, I would recommend you spend some time with history and get caught up.