M'kay... uh... a snipe out of nowhere? Lemme get my two cents in while keeping this brief.
"Sniping" is kinda dumb, both conceptually and practically. It fails to define the essence of what it is and why you shouldn't do it. The "morality" of it is 100% situational and up for debate, but this instance can be summed up pretty easily.
Some people are self centered. And I'm sorry, but there's no excuse for just being a shitty person.
Perhaps they weren't aware that this wasn't a very good idea? idk
Edit :: bro i saw this sentence and it's like "hm lemme add a single word onto it that'll make me sound sm@rter"