Or like "not all people who think themselves better than the rest of us make stupid sneering generalisations, but all people who make stupid sneering generalisations think themselves better than the rest of us".
So you think a majority of people voting in the Brexit referendum who hold racist views voted Remain?
I'd be surprised if you are correct, I think that's slightly far fetched personally.
Not stupid, nor sneering at all. Plenty had reasons to vote Brexit that they saw as perfectly valid.