Tours by and to South Africa were a very sensitive subject in the 1970,80's and 90's due to apartheid. Many players around the world pushed for these tours so that the barriers of apartheid were brought down.
I'm delight to say there has been success here
Chat with our AI personalities
In basic terms it was due to Apartheid "a social policy or racial segregation involving political and economic and legal discrimination against people who are not Whites". The discrimination against non whites was a very emotive subject. The tour was considered supportive of this and people voice their opinions in support of equality.
New Zealand did not want South Africa to come to New Zealand because they did not want to play against black people.