We don’t know if it was a mistake or not, and we still do not have proof who was the attacker.
If it was done by mistake: Mistakes can happen easily, especially when the processes are fresh and everything is chaotic. Those mistakes can happen on all levels, from intelligence to the person actually shooting.
If it was done on purpose: propaganda is a big weapon and there can be multiple motivations doing an attack like that. Non of them include ethical standards, international law or morals. War sucks always.
We don’t know if it was a mistake or not, and we still do not have proof who was the attacker.
If it was done by mistake: Mistakes can happen easily, especially when the processes are fresh and everything is chaotic. Those mistakes can happen on all levels, from intelligence to the person actually shooting.
If it was done on purpose: propaganda is a big weapon and there can be multiple motivations doing an attack like that. Non of them include ethical standards, international law or morals. War sucks always.