I don’t think the article does a good job of comparing the numbers from Gaza to those of other recent battles in the region. The way Raqqa is presented is just wrong, with “in contrast” used to imply that that battle was safer for civilians when it in fact wasn’t.
My own math is very crude, because I’m just working with the numbers given in this article. I think a good analysis would include more factors, like the number of combatants involved. Even then, some things are going to be difficult to count accurately or even to quantify at all. It’s hard to do arithmetic on how many people are killed every day without appearing callous, and I don’t think I succeed, but that arithmetic is still necessary to understand what’s going on.