Sheldon hypocrisy?

The very popular Big Bang Theory on Channel 4 is fine comedy and strangely, is especially loved by those kinds of people who find themselves particular targets of this Blog.
The main source of the humour is that the leading character, Sheldon, whilst being incredibly intelligent, is both socially maladjusted and a sufferer of Obsessive/Compulsive Disorder.
It was Frankie Howerd who always said 'Never mock the afflicted' but it was the liberal left who have outlawed any such humour.
How odd then that the politically correct are permitted to make an exception with this programme.
I do hope that nobody accuses them of being hypocritical.