The same applies to all those who have made personal attacks on those ministers who have resigned from the government - and those who have not - and to those Labour MPs who have made themselves contenders for the "Pot calling the kettle black award" for 2018 by making a huge fuss about two cabinet resignations when their own front bench has suffered more than a hundred resignations under the present Labour leader.
("Dear Pot, thanks for your comments. Yours sincerely, Kettle.")
As I wrote on Monday morning, a former World War II hero who know what being shot at for real was like and had become Conservative MP for Winchester after leaving the navy, Rear Admiral Sir Morgan Morgan-Giles DSO OBE, once attempted to calm down an earlier angry debate about Europe with the joke,
Good advice then. Good advice now.
The Prime minister and the members of her cabinet who support the Chequers proposals have not "betrayed" or "sold out" the 17 million people who voted for Brexit. They are doing their best in extremely difficult circumstances to implement the decision of the 52% who voted Leave in a way which respects the interests of everyone in the country. Whether you agree with them or not, using the language of betrayal to describe the proposals does not move us forward.
Anyone who imagined before or after the referendum vote that unpicking 44 years of integration with the EU could be done quickly and easily with no messy compromises was grossly optimistic to a degree which verges on the delusional. Real life isn't like that. The fact that the PM is grappling with those messy compromises does not mean that she is selling anyone out.
Throughout her tenure of Number 10 Theresa May has attempted to maintain the balance of Brexit supporters and Remain voters within her government. The fact that the great offices of state are now occupied by people who voted Remain is because a Leave supporter who she had appointed to one of the most important offices in the land and allowed to retain that position with enormous patience chose to resign, not because of any kind of remain "coup" as some of the febrile language used in some quarters would have you believe.
Some Brexit supporters have put themselves in the absurd position that one minute they were calling on fellow leavers to resign from the government, and the next minute they were complaining that the government contained too many people who had voted Remain, including the holders of all the top officers of state, a situation which came about precisely because some Leave supporters did resign.
The need to avoid divisive and extreme language applies equally to both sides. It would not help in any way to use inflammatory language about the former ministers who resigned from the government over the past 72 hours.
Britain is leaving the EU and unless there is a unanimous vote by all 27 other member states to defer it, this will happen at the end of March 2019. UK negotiators need to make one last push to negotiate the best deal we can, and it needs to happen now, and anything which undermines that, whichever part of the political spectrum it comes from is against Britain's interests.