Allow me to attempt a translation for you, Jim:
I think "Jezza" in this case refers to Clarkson, who is a Tory supporter and allegedly has other unpleasant personal habits (hence the *******). Mr Cook doesn't think that thumping a production assistant over a small matter like cooked food could be described as reasonable and so he should not be invited to return to host the program.
As an example of correct grammar, syntax and punctuation it certainly wasn't one of the best (more like throwing Scrabble tiles up in the air and writing down what they say when they land), but I have seen worse on Internet forums...
Bon voyage, Mr Evans! Now you have more time to spend with your money, your ego and your Ferrari collection.
DM