Why do you think Africans did not welcome the formation of the union

Explanation:

because the union was voting against them. They were not excepting the African Americans. So the African Americans said we don't accept which made Americans mad.

when the Act of Union of 1910 brought together the previously separate colonies of the Orange Free State, Transvaal, Natal and the Cape to form the Union of South Africa, the British and the Boers (Afrikaners) put aside the bitterness of war in order to entrench White power and privilege at the expense of all