@HeadDeskHeadDesk
As you've said there's always this denial and deflection where the inconvenient truth gets swept under the carpet. Little details get used as excuses to deny entire things. Similar to what you were saying it goes something like this ( and I'm completly making these numbers up to illustrate a point not claiming these numbers are the actual numbers )
A news source shows heavily pixellated pictures and says these are two decapitated babies.
Another source claims a number of babies were decapitated, perhaps as many as half a dozen.
A denier will then do this:
There were only two heavily blurred pictures which the news source said were decapitated babies but how do we know? We can't see. So the IDF makes the originals available, and now the claim is well you can't trust the IDF, those are fake decapitated babies! There are no decapitated babies.
Another denier will say well news source two said there would be up to half a dozen, but only two pictures were presented! Where's the rest?? The whole story is fake!
What happens is deniers worry at the edges of the story, trying to use any differences in small details in an attempt to invalidate the whole. That the number of decapitated babies might differ depending on who's reporting and what they themselves witnessed is used as an excuse to try and invadidate that any babies were decapitated by haggling over the numbers.
I assume, perhaps wrongly, that any normal human being would be utterly against even the concept of decapitating babies, no mater what the exact number, and not demand ever more impossible evidence "Well thousands of miles away over here in the UK I didn't see any decapitated babies, so there were none. Bring me the bodies to prove it!". Especially where their friends are waving flags and celebrating outside, and bigging up the number of babies decapitated.
One last point. What @HeadDeskHeadDesk and I desribe here I've seen before in my lifetime. I remember when I was around teenage years people trying to dispute the number of Jews killed in the Holocaust. Intracate stories with plans, and model mock ups of the concentratiion camps, and a long lecture trying to convince me that it wasn't possible to burn six million jews in that time because the ovens couldn't fit enough bodies through at maximum capacity. Doing all sorts of maths, and making all sorts of justifications why the six million number was too big.
When as a human being, you look at the Holocaust, and the message you take from the Holocaust is that you should do the mass gassing people in shower rooms maths, and the burning people's bodies in ovens maths, and start building little models, then you may have a body and a brain, be able to breathe, move, eat, and sleep, but you are not a human being. The answer to any deliberate massacre is not to try and disprove it happened but to stop it happening again. Trying to disprove killings like this does not work, but it does mark you out as an utterly aweful human being.