Simon Heffer doesn't strike me as the cheeriest soul himself. I have only seen him once in person; at Lords, which is a jolly enough place, and he had a longer face than the sporting circumstances justified. Still he nails the left in the linked article, which is unusually supportive of his avowed foe David Cameron.
Lefties, with one or two notable exceptions, are a sour, boot-faced lot. They are inevitably so because they are motivated by grievance and envy, neither of which is a sentiment guaranteed to put joy in one's heart. They seek offence where none is intended; they strive to suppress individuality of expression; they like to control others. Humour, whose main purpose throughout existence has been to deflate such priggish, pompous and sour attitudes, is therefore the enemy of militant Lefties, who wish to standardise attitudes and behaviour, and whose political project is to enforce and inflict as much control as possible over others.Quite. Though Cameron would present a more difficult target for the miserabilists if his jokes were any good. I am convinced enough now of his good humour. It's his political courage I doubt.