The second pre-emptive editorial Mark wrote was intended for lower class tabloid type newspapers. It reminds me of the sort of stuff found in our New York Post here in NYC. It's intent is to arrouse the aggravation of the public about what really set off the riot.
Almost every paragraph begins with a question. "What is happening at Edgestow?", asks Mark. He then goes on to supply the obviously correct answer, as the N.I.C.E. sees it at least. To me it sounds rather like a catechism with it's cut and dry questions and answers. Everything is presented as black and white, without any gray areas in between. Unlike the high brow publication's editorial, this tabloid one goes on to inflame the suspicions of it's readers by proclaiming the riots to be engineered by the enemies to the N.I.C.E. Mark knows he can't fool the common folk about the sort of disturbance in Edgstow. So he has to deflect the blame to others, all those opposed to the National Institute.
Mark then goes on to warn readers about those who would disparage the progress of the N.I.C.E. by refering to them as "the Mrs. Grundies". Mrs. Grundy was a character mentioned in Thomas Morton's play Speed the Plough. She is a personification of the tyranny of conventional thinking. Mark is insinuating that all those who oppose the N.I.C.E. are reactionaries who refuse to accept the spirit of the times. "Squares" would be the name given to such conventional thinkers.
The sad thing is that after all this obvious lying, Mark is impressed with his misleading propaganda. Instead of comming to his senses he feels more at home with his position at Belbury. Lewis illustrates what can happen when any of us fall in with the wrong crowd. We seek their approval, even at the expence of the truth and of the good of others outside the group. We often are unaware of how the company we keep shape our own outlooks on life.