Not entirely sure, I think it’s just the way some influential people started talking and now everyone is replicating it. The origins in why people talk like this is probably partly rooted in a mix of virtually ‘yelling’ and old people writing in all caps because they can’t see the small letters.
I mean, to be frank, I can’t remember any actual news of fighting between Israel and Hamas. The last ones were maybe a year ago- if I am wrong, please correct me. Instead, all the news are ‘Israel indiscriminately killing everybody with 0 casualties of their own’. Isn’t really a war anymore. Maybe it was for a bit at the beginning, but Hamas and all its allies were decimated within the first year and a half of it. They are more or less undone from what I gather. All that is left is genocide now. I really struggle to call it a ‘war’ while Ukraine VS Russia is happening where both sides are taking heavy losses and the outcome is uncertain. With Israel, the outcome is pretty clear and certain- eradicating or displacing all Palestinians. They don’t even pretend it’s about Hamas anymore, because Hamas and it’s allies are mostly gone and/or crippled.