I believe that Netanyahu has harnessed the abject grief and fear generated by what happened on 7/10 to further his own goals.
I also think he saw it as an opportunity to play The Great Wartime Statesman with the constant WWII references, and to win back public favour after being on the brink of facing jail for corruption, and then trying to rig the judicial system to ensure his own impunity.
Of course this has blown back spectacularly, as most Israelis see him as being responsible for both the security failings and handling of the hostage crisis.
Have you been to a march? There are plenty of Jewish people there who are part of Jewish activism groups. Of course in huge cities there will be some bad faith actors who tag along, but these are a minuscule fraction of the hundreds of thousands involved. They are dealt with by police.
I remember going to the marches when the Lib Dems promised to get rid of student fees, but then tripled student fees in the coalition. We were all labelled yobs because of a very small handful of tag-alongs who wanted to cause destruction, despite the high numbers of peaceful protestors present.
Legitimate, peaceful protests will always be branded in a negative light because it benefits those in power for people to remain obedient and unquestioning. Look at the lengths Netanyahu is going to in order to shut down protest.