The rise is still there and that is not a good look. I would also bet that most stuff goes unreported.
Are all Leave voters racist? No. But anti-immigration sentiment certainly played a major role in the campaign. Which is strange, since I don't think immigration within the EU is a large problem. Immigration from outside the EU seems to be what people are afraid of - and there are valid complaints there I think - but the anti-EU thing seems misguided.
You'd be completely wrong. There's a lot of anti EU sentiment, lots of Polish and Romanians caught the brunt of the post brexit hate. Immigration from outside the EU is strictly controlled, at least far more then within, so whatever complaint you feel is valid outside the same would apply to immigration within given there's not the same degree of filtering that takes place.