This is a fairly short article and it is worth reading, I think.

South African ambassador 'no longer welcome' in country, US Secretary of State says

"In short: US Secretary of State Marco Rubio says South Africa's ambassador to the United States 'is no longer welcome' in the country, accusing him of hating US President Donald Trump.

"Both Mr Trump and his ally Elon Musk have criticised South Africa's Black-led government over a new land law they claim discriminates against white people.
What's next?

"Neither Mr Rubio nor the state department gave any immediate explanation for the decision."

...

"Marco Rubio, in a post on social media platform X, accused Ebrahim Rasool of being a 'race-baiting politician' who hates US President Donald Trump.

"Mr Rubio then declared the South African diplomat 'persona non grata'.

"Neither Mr Rubio, who posted as he was flying back to Washington from a Group of 7 foreign ministers meeting in Canada, nor the state department gave any immediate explanation for the decision.

"But Mr Rubio linked his post to a story by a right-wing Breitbart news site about a talk Mr Rasool gave earlier Friday local time."

...