The feeling I got during the last months here when there are articles about this war is, that there are either many Israelis here flagging anything that makes Israel look bad, or many Americans, who somehow feel allegiance to Israel and think that this ever was about a good cause.
On the other hand of course there are also those that jump on any claim that makes Israel look bad. Claims of which there are many. Of which far too many have become pretty evident. Which far too many people do not want to be true and will ignore.
So what can one do? I guess keep an open mind and give claims a couple of days to be proven or disproven. Only then judge.
The generally accepted terminology here is "pro-Zionist" and "anti-Zionist". There is a concerted effort to conflate "anti-Zionism" and "antisemitism" in public discourse. You're not imaginging things. It's part of an organized campaign generally called hasbara [1]. Articles or videos that don't suit this narrative are brigaded, flagged and reported (as you noted).
I say all this because to call it "Israeli" is inaccurate. For example, in the US Christian Zionists outnumber Jewish Zionists by at least 20:1. Many of those Christian Zionists themselves are antisemitic. This is another reason why our language here matters and we need to be precise with our termminology.
Just like this war is not about Judaism or Islam, there are Israelis, who regret the actions of their government and military. And there are many jewish people out there, who have said "Not in our name!". Lets not forget them. This is not about Jews or being Jewish. But Zionists do not care about actual Judaism. They care about power and expansion.
What I do find sad though is, that there are also many non-military Israelis online, who still seem to have some kind of national pride and think that Israel is the best country in the world, while actually their country is being overtaken by right wing extremist militarists. Maybe it is compensating/copium for knowing, that the country they live in has no regard for human rights, ongoing for decades and the shame that comes with that.
Lets not forget what happened before the newer hot phase of the war Israel is waging. Tenthoudands of people demonstrating against Netanyahu's intention to limit the power of the judges, presumably to absolve himself from his own corruption. But now we need those voices to cancel Netanyahu, if they still can and their country has not already been lost to some kind of autocracy.
The astroturfing from pro-Israel parties on social media is incredible, but nothing beats the Reddit situation.
I was just browsing /r/ukpolitics just now, and it is mind boggling how many pro-Israel comments come from people that apparently are only commenting about that topic. No activity whatsoever on popular subs, on hobby subs, but instead their entire posting history is composed of months and months of tirelessly defending the state of Israel.
Sounds like work, and it seems that many forgot about the Mossad-operated propaganda farms that made the news a decade ago. Most people are so blind to propaganda that these fake personas do not even have to be particularly subtle about it.
It would be so easy to identify these paid state actors with some simple code, but I do not want to give ammunition to those other cretins that would use such a tool to target Jewish people as a whole; so I just notice the propaganda and move on.
Reddit is a problem only on the popular frontpage subs for people with just-reading or no accounts. If you make an account and read certain subs their algorithm will recommend you the alternate subs that are less astroturfed and the discussion is free from people telling you that there's evidence and reports that don't exist and insult you if you ask for links, or people that say that something says something and post you a link and then you go and it says something else (usually less favorable to Israel). The main subs have been pretty bad with Israel-related news since forever, it's not a new thing, it's that there's more of those news now.
/r/ukpolitics is not a main sub, yet they operate on there as well. It is not very hard to have an alert any time anyone posts a topic with the word "Israel" in the title, coming to mass downvote anything remotely critical of their employer.
Of course on a main sub like /r/worldnews for example, the astroturfing there is even more noticeable and blatant.
You know what makes it even more obvious? How seemingly few Israeli or Jewish people on social media seem to be against the current massacre and/or the Netanyahu government. Of course there are many in the real world, but these dissenting voices are drowned by the massive pro-govt propaganda operation.
On the other hand of course there are also those that jump on any claim that makes Israel look bad. Claims of which there are many. Of which far too many have become pretty evident. Which far too many people do not want to be true and will ignore.
So what can one do? I guess keep an open mind and give claims a couple of days to be proven or disproven. Only then judge.