Saying people have made a mistake is not the same as calling them stupid people. That's true even if you say it was a stupid mistake.

Everybody makes mistakes, some of them are mistakes which in retrospect we will recognise as stupid mistakes. "How can I have been so stupid" is something all of us are liable to find ourselves saying - in fact being able to recognise that is an indication of being intelligent.

Voting for Trump in my opinion was a terrible mistake for those Americans who are likely to be much worse off because of his actions. Choosing Clinton over Sanders was also, I believe, a mistake, both because he would have made a better President than Clinton and because Trump would not have beaten him.

I am sure that there will be many normally sensible Americans who in a few years time will reflect on both votes, and think "How can I have been so stupid? "... There will also of course many Trump voters who will think of at the tax cuts skewed in their favour, and who aren't concerned about the needs of people suffering from health cuts, and cheated of the job opportunities they were promised., and they will be congratluating themselves for their wise choice.