Clarkson has written tongue in cheek columns filled with hyperbole like this for years, you can literally go back 20 years to see this exact writing style. Previously it was assumed he was using over the top humourous exaggeration to make a point
That's not allowed now though.
Don't forget that something along the lines of "I wish so and so was dead" is now considered a credible death threat entitling the named person to police peotection.