Earlier quoted context omitted.
To what extent is repeated mass-murder of civilians, total destruction of healthcare and education systems, etc. part of the "moral gray area"? That's just not a serious argument. You can be pro-Israel without pretending to hold humanist values and so on.
If you have a military enemy that blatantly hides itself within civilian areas and builds its underground infrastructure underneath civilian infrastructure, and that military enemy kills 1200 of your citizens in an attack, that creates a fair bit of moral ambiguity.
https://archive.ph/2023.10.14-033824/https://www.haaretz.com...
https://blogs.timesofisrael.com/hamas-israels-own-creation/
Anyway, the idea of embedding military targets within civilian populations is also not exclusive to one side:
https://www.haaretz.com/2012-06-09/ty-article/.premium/does-...
Neither is the use of terror:
https://en.wikipedia.org/wiki/King_David_Hotel_bombing
https://web.archive.org/web/20121226235336/http://www.foreig...
https://www.ohchr.org/en/press-releases/2019/02/no-justifica...
https://www.thetorah.com/article/israels-incomplete-conquest...