Explanation: There are two independent clauses (the first ends at "paint job" and the second starts at "I have decided") with no punctuation or conjunctions between them. In this case, joining them with a semicolon would be optimal, given the relationship between the two.
making an appeal to all for basic human decency in race relations
explaining the oppression black South Africans had faced for decades
showing the parallel between apartheid in South Africa and the Civil Rights movement. All 3 of these points were covered by Nelson Mandela's above speech and that basically he was appealing to all South Africans be they white or black to learn to live together in peace and equitably and renounce the apartheid white racist regime of the past.
