I do find this interesting. This kind of denial comes from a few things, I think. There's the well known phenomenon of confirmation bias where people simply give more weight to any information that fits what they already believe and discard what doesn't. But I think for a certain type of person, it goes a lot further. I think there are a lot of people whose entire identity is wrapped up in being a 'Good Person' on the side of right.
And it's much easier to simplify everything into Gaza = Good and Israel = bad than it is to look at the incredibly complex politics and history behind the middle East, behind Israeli history, behind Hamas, behind Gaza and Palestine.
I think its a form of deep intellectual laziness and cowardice. If the October attacks didn't happen, then that 'Good Person TM' can go ahead and campaign and malign Israel in good conscience.
No questions have to be asked. No thought needs to be be given as to how to solve an incredibly complex and longstanding religious and political problem. They don't have to do anything other than turn up with a placard and shout a bunch of slogans and sleep easily at night knowing they are doing right.
But if the October attacks did happen, then as a 'Good Person', then if they are simply going along with everything, including supporting Hamas, then they are aligning themselves with something so incredibly horrific that their brains refuse to believe it can be true.
Because that puts them into the bad people camp.
People don't like questioning themselves or their own beliefs. Even on this thread, we've had a poster look at the source of the story as the Daily Mail and immediately try to persuade us all to dismiss it.
They've not made any attempt to verify whether this particular story true or its not. Just dismissed it because that's easier than asking whether it is and then having to reassess or update their beliefs and knowledge about the Green Party.
In many ways, I think this kind of thinking has replaced a lot of traditional religious belief as Britain has become more secular. It's turning a particular political alignment into something in which you either have complete faith and need to defend, or you're a heretic.