Who is blaming the victims? I am just saying that organising a concert so close to disputed territory was a stupid idea, which put a lot of innocents at an extra risk.
That’s victim blaming.
It’s like saying victims of rape should dress more modestly or avoid sketchy neighborhoods, otherwise they’re “asking for it”.
Can people use more precautions? Sure. But it’s never okay to dismiss atrocities done to a person by someone else because they weren’t careful enough.