Why do we need to know that "a white man" gave you a list? How is it relevant?

You clearly aren't a discerning reader. Arnie had stated the 'white man' who gave him the list had mentioned that the recruiters on it had found work for him. But the same recruiters couldn't even be bothered to reply to Arnie's e-mails!
In fact, it's not the recruiters who are the racists per se, it's the schools they recruit for. And I'd say it all boils down to the Chinese parents and/or their offspring connected with those schools. The root of the problem lies with them.
And don't try to suggest the Chinese aren't discriminatory re black people. Anyone who's been in China for a few months or longer knows this very well. You're either blinkered, or someone who chooses not to face the truth.