Jim,
"and there is no reason to assume that he is a racist."
Unless you actulally examine his party's actions and aims

Have you Jim?
Care to share something you found that you object to?

Steve,

Nigel Farage is a racist because he was the leader of a party which obsessively pursues an agenda predicated on xenophobia.

But it does not and never has Steve. Can you back your claim with any fact?
As always, no.

And he did stand proudly in front of a poster showing a long line of mostly black REFUGEES which was ostensibly about controlling the movement of EU citizens.

The poster showed a genuine picture of migrants waiting to enter Europe so they were non-Europeans, but not black actually.
Once in they can indeed move freely between countries. That was a serious issue in the Brexit debate.