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.
To be honest, I don’t think any aid will reach anyone. I think this is a move that puts Israel in a position to either let them through (unlikely) or violently intercept them and do something bad enough that the western governments whose members are on those ships are actually forced to care by the public.