How do Israeli racists know which Africans aren't Jews?

Q & A with David Sheen at Trinity College in Hartford, CT on March 14, 2014
How do Israeli racists know which Africans aren't Jews?
How do Israeli racists know which Africans aren't Jews?
How do Israeli racists know which Africans aren't Jews?

israel,africa,refugee,eritrea,sudan,zionism,racism,