It is very much true and documented.

in the early days of the current camapaign Israel also told people to flee to the Rafah crossing, to bomb it a few hours later. At that point it could be argued, that the different parts of the government struggled to coordinate their actions and made a mistake.

But since then this has happened repeatedly. Including the bombing on UN operated hospitals, schools and refugee camps it is pretty clear, that Israel considers the prevention of civillians killed by Israeli bombs an afterthought at best.