There is no justification for Israel's occupation and apartheid of Palestine. The attacks on civilians are unjustifiable as well but the trigger for them wasn't random - Hamas never would have come to power if Israel didn't occupy Palestine, let alone fund Hamas with the explicit stayed goal by Benjamin Netanyahu to divide Palestinian politics.

Look to Israel, the source of decades of suffering for everyone in the region, including its own citizens whom it exposes to retaliatory violence in response to the violence it delivers to its neighbors.