I think this shifted overtone window has partially to do with why they started this war to begin with, they see the writing on the wall and their window of opportunity is closing. Trump is at historic lows in polling [1]; 65% of democrats now sympathize more with Palestinians over Israelis (17%) [2]. HN is just a generally reactionary place, I wouldn't read to much into that.

[1] https://www.natesilver.net/p/trump-approval-ratings-nate-sil...

[2] https://news.gallup.com/poll/702440/israelis-no-longer-ahead...