Now, hear me out - I'm not saying that Trump is a racist himself (I'm also not saying he isn't), but it's undeniable that his candidacy has been boosted by racist supporters. They will take this victory to heart and consider it a validation of their world view, irrespective of whether it actually is or not. Worse, future political candidates will see this victory and pander to these same impulses in the future.
On a more general note, it's really damn difficult to know who wins here. Because what does a Trump/Republican administration look like? Trumpism is really quite different to Republicanism (particularly where big business is concerned) and there's a lot to be decided in how this will go.
Oh, wall builders. They might be winners.