"was an 'incitement to racial hatred' then I'm sure you could get someone to start a prosecution."
It should be, but in the world we live in such behaviour has become acceptable - if the Foreign secretary and the President of the United States cand get away with it....

We really don't need written laws to tell us what we can see - we are learning only to well that the wealthy and powerful can circumvent laws with ease, should it be convenient to do so.
Confirmation of the hate inspiring nature of the 'Leave' campaign can be found in the immediate aftermath - the rise in hate incidents (which you, to your shame, have tried to minimise and the open presence of fascists on the British streets in the form of Robinson and his scum

When Enoch Powell mounted exactly the same campaign back in the day, his behaviour was unacceptable, even to his own party - the only way he could remain in politics was to cross the Irish Sea and throw in his lot with a sectarian party
It would not surprise me to read that Brave New Brexit Britain, will erect a statue in his honour

"Surely 'ex-army Nazis being jailed' shows that Britain is not accepting of racism,"
On the contrary, taking just the most extreme and ignoring the mainstream Neos plays into the hands of the rabid right - Nick Griffin realised this when he attempted to respect realise the British National Party
It was internal squabbles and incompetence that destroyed the BNP, not British laws
The same goes for Ukip which virtually laughing-stocked itself out of existence
Jim Carroll