I understand where you are coming from, really… And I also appreciate the care that went into crafting your reply with the clear considerations to keep a neutral and rational tone, so I wish to extend the courtesy back.
The major contention I have with your position is that it is only easily justified if it were true that Israel is in fact indiscriminately bombing Palestinians. However the basis in reality to support the indiscriminate claim just doesn’t exist at the current point. In fact the specific video posted here is explicitly contradictory to that argument. Israel has developed military technology beyond nearly every other country in the world in order to precisely and discriminatorily be able to target enemy combatants in civilian dense urban areas. The roof knock bombs that IDF use prior to levelling a structure so that citizens can have time to flee the scene is a prime example as well.
No dude… Nothing like that… Israel has made plenty of mistakes, especially in the past, and this is an extremely complex issue.
To answer your first question in terms of casualty counts. The very first thing is that casualty counts are very commonly over/under inflated, especially during times of conflict. There are many reasons you may want to over inflate or deflate your numbers. But honestly it is really difficult to take casualty rates at face value. Let’s say we take it for what it is and its skewed. Now we run straight into a philosophical conundrum that is probably much to big to effectively argue through on the internet.
Your philosophical position on about a dozen or so moralistic arguments are going to shape your ultimate decision on where you stand in terms of casualty imbalances.
So I will skip all that and give you some of the things that I believe would bring me to your side.