He says criminal gangs specifically target children to work in illegal mines across South Africa.
Police have named the suspect as 30-year-old Elias Rodriguez of Chicago, who is now in custody.Mr Rodriguez is accused of fatally shooting Yaron Lischinsky and Sarah Lynn Milgrim, who both worked at Israel's embassy in Washington DC.
The two were a couple, according to Israel's ambassador to the US Yechiel Leiter. The ambassador said the young man had bought a ring this week and planned to propose next week in Jerusalem.The shooting unfolded at around 21:05 local time (02:05 BST), when a gunman opened fire at the couple as they were leaving Wednesday night's event.The chief of police in Washington DC, Pamela Smith, said Mr Rodriguez was allegedly seen pacing back and forth outside the museum before he approached a group of four and shot two of them with a handgun.
Moments later, eye witnesses said they spotted a man entering the museum "looking very distressed.""We thought he just needed help and just needed safe shelter," Katie Kalisher, an eyewitness, told the BBC.
Another witness, Yoni Kalin, said "people were calming him down, bringing him water, taking care of him".
It later became apparent that the man they were helping was the alleged shooter, Mr Kalin said. After police arrived, Mr Kalin said the suspect confessed to the shooting and "pulled out a red keffiyeh".The president's sentiments were echoed by many South Africans, including Mr Janse van Vuuren, who is proud of his Afrikaner origins.
While he was not raised in a farming family, he has relatives and friends in agriculture who have been victims of crime.He said that while it was undeniable that some farmers faced "genuine threats and hardships", it was important to be cautious "when discussing claims of persecution or discrimination that portray an entire group as victims of targeted violence or systemic oppression".
While many white South Africans echo Mr Janse van Vuuren's sentiments, there are also those who see themselves as a persecuted minority.Among them is Ilse Steenkamp, who along with her family, has applied for the programme but has not received feedback. She did not want us to use her real name.