Or how about if we take it way back and remember when Johnson was forced to apologise after he referred to black people as "piccaninnies" during his London mayoral campaign in 2008. In another column for The Telegraph, he used the word again when he mocked Tony Blair's globetrotting, saying:
What a relief it must be for Blair to get out of England. It is said that the Queen has come to love the Commonwealth, partly because it supplies her with regular cheering crowds of flag-waving piccaninnies.
The piece also mentioned "watermelon smiles". Yes, really.
Or how about that time when he linked Papua New Guinea to "cannibalism and chief-killing" in another newspaper column in 2006?
And the list goes on.
It didn't take long for people to take to Twitter to remind the Brexiteer that he has said some pretty offensive and polarising things in the past.
.@BorisJohnson seriously? You compared the EU to Hitler in 2016.
Toxic polarisation is describing black people as… https://t.co/Dm8EIyzDeT