- whereby those important events of the past, usually associated with someone's death or the end of some awful bloody struggle, are celebrated with a nice holiday....
Having long since seen little point in attending to religious ceremony, or really ceremony generally speaking, I see no reason to commemorate such useless things. So instead I will demonstrate my annoyance with some particular commemorations.
Twisting Fawkes attempt to impose Catholicism into a struggle for freedom is a little off-putting, but otherwise, it is not all that distant the operations of most modern religious institutions and their promises of order, of freedom from thought (rather than of thought), and so on from V's speech.
I suppose if your desire is to depose of your reason and your faculty for tolerance of viewpoints distinct from your own in exchange for an illusory sense of balance and appoint to yourself a label of holy moral judge of the character and habits of others, if your desire is to absolve yourself the responsibility to live in exchange for the presumption of an afterlife, and that always full of reward. If it is to demand of others the conformity to your comfortable assumptions and claims of common sense rather than investigation of wisdom and a discomforting presumption that you might be wrong, then religion is the perfect world for you.
But I'd have to ask how far it has fallen since Aquinas and Augustine and others to make a challenge of free will and the responsibility of engaging and wrestling with one's moral ethical standards over a lifetime somehow a mortal danger worth casting aside in favor of being told what to do and how to live by others.