For instance, if one traveled to the other’s home, would they act in what we would consider a racist manner. I’m trying to figure out if the hate started as a result of the widespread use of slavery or existed prior.
Not to discourage any further answers but you'll probably enjoy:
Europe had normal diplomatic relations with non-white nations before turning explosively racist to justify their actions against all others. What happened to cause this shift? by /u/victoryfanfare
As a black person, how would medieval Britain react to me roaming the streets? by /u/cdesmoulins
On race in the Roman Empire by /u/cleopatra_philopater