While child NPCs are not usually spawnable in the menu, they can be spawned through commands, and there is a featured mod that adds them to the spawn menu.
Not in the base game but Steam as a whole has a giant antisemitism problem so Steam Workshop games are always at risk. There are Nazi-themed add-ons available.
I guess it's up to the player but there is no scripted scenario that forces a black man to die before others. As always, this could happen in online play, but I wouldn't take it for being.