Tu veux des chiffres ? J'ai des chiffres, venant de personnes douteuses : la police britannique.
http://www.independent.co.uk/news/uk/crime/brexit-hate-crimes-racism-eu-referendum-vote-attacks-increase-police-figures-official-a7358866.html

There was a sharp increase in the number of racially or religiously aggravated crimes recorded by police in England and Wales following the EU referendum.
In July 2016, police recorded a 41 per cent increase compared to the same month the year before, according to a Home Office report.
These official figures appear to correlate with previous reports of a rise in post-Brexit hate crime.
Data from 31 police forces showed that 1,546 racially or religiously aggravated offences were recorded in the two weeks up to and including the day of the referendum on June 23.
But in the fortnight immediately after the poll, the number climbed by almost half to 2,241.
In September, the National Police Chiefs’ Council released figures which showed the number of incidents rose by 58 per cent in the week following the vote to leave the EU.“Nobody in this country should have to live their lives enduring fear, intimidation or – in a third of cases – violence because of who they are,” said Mark Hamilton, the National Police Chiefs’ lead on hate crime.

Certes, on ne sait pas si la tendance s'est poursuivie après le mois de juin.

Sinon, food for thought, et oui ça me fait réfléchir :