Remember these are people who know what it's like to go through apartheid and ethnic cleansing.
South Africa today is largely governed by the people who fought and won against apartheid, so it's understandable that they feel a level of solidarity with the people of Palestine.
(in this context I'm choosing to gloss over the real and present issues with the ANC, because they are not relevant to Israel's genocide)
You mean that every American citizen is automatically issued a photocard ID free of charge after they reach a certain age?
Because that's how it works in most of Europe for example. Some countries mandate that you must carry it at all times in case the police requires you to identify yourself. You use this card to vote, and you can also travel freely within the EU with it (loads of people don't even own a passport for this reason).