I'd be most likely to be on the same side as Ollie in most cases, but I think Barry is right, sort of, here. Assuming he was equally "show me" about other candidates. Ollie is arguing from tokenism here and it doesn't look good on him. He really shouldn't have added that part and I don't think Jefferson would have appreciated it.
Now, if Flash more readily accepted other new members that he didn't know well personally who were, shall we say, less black, that would be, well, very midwest of him.