"We are now saying, those who have been concerned and fear that this will not be well handled should be reassured we are as responsible as we were when we settled the apartheid nightmare under the leadership of Nelson Mandela..."
In turn, the South African government accused Mr Trump of stoking racial divisions.
Tensions have been high in South Africa in the middle of all this with South Africa's President, Cyril Ramaphosa, claiming that the white community that makes up eight percent of the population "possess 72 percent of farms".
In its quest to rebalance trade relationships, Trump's administration is giving no quarter as it targets friend and foe alike, from the European Union to China.
While much of the investment from Britain is private, it is still a key source of investment in South Africa.
"However, as the need for a non-combatant labour force grew increasingly urgent, British pressure on the South Africans also grew".
South Africa argues that the US industry is tailored to Americans' preference for white, de-boned breast meat.
He said his government is working earnestly to bring policy certainty in areas such as mining, telecommunications and energy, hoping to restore South Africa's sovereign ratings, which are now at junk status, to investment grade status.
There were plans to award black ex-SANLC members the British War Medal but these were opposed by the South African Government and the British also dropped the idea.
However, the ANC reiterated its commitment to pursue the country's controversial land reform program.
May was on her first African tour since taking office in 2016.
The cable, sent Wednesday morning and obtained by Foreign Policy, does not mention the president or his tweet at all.
The department's annual country reports on human rights "have documented concern 'about killings and other violent crimes against white farmer, and, on occasion, their families, ' but we have not seen large scale killings of white farmers".
"Some journalists and lobby groups have simplified complex land disputes to serve their own ends", the cable says. It is the most reasonable way to deal with a legacy such as we have.
Ultimately, with legal action pending, the South African government's hands may be tied.