That right there is a wedge that can be opened. (Not be someone who comes across as being left-wing, who they'll likely reject out of hand, mind).
The seed of doubt has been sown, and now it remains to be asked just how kidnapping brown people (phrasing it that way won't work but I'm not currently trying to convince anyone...) benefits them, personally. It's an opportunity to examine the disconnect between things they feel are connected - "everything is shit and I don't have enough money" and "there's too many foreigners and brown people".