What I have seen is a confusion (perhaps intentional) between anti-semitism, and protesting Israel’s behavior since the Hamas attack in October.
Criticizing Israel’s response is not anti-Semitism- it is literally just criticizing the response.
Which isn't a one sided phenomenon. The reverse is true as well, where often the most vocal voices rationalizing Israel's actions and behavior around civilian casualties often have anti-Muslim perspectives crop up as back and forth conversation goes on.
One of the litmus tests I've noticed is the capacity to acknowledge and condemn the civilian suffering of both sides. The commenters who recognize and condemn both the Oct 7th terrorist attack and the targeting or indiscriminate killing of civilians in the response to it tend to be rational and level headed driven by humanitarian concerns.
Those who only recognize the suffering of one side and dismiss, dehumanize, or rationalize the suffering of the other side - or worst of all propagandize the denial of it's occurrence or scope - tend to quickly fall into revealing rather abhorrent views with a mere scratching of the surface.
Not everyone who criticizes Israel is antisemitic nor everyone who criticizes Hamas is anti-Muslim, but many who are antisemitic or anti-Muslim seem keen to defend their respective side of the conflict quite emphatically and unilaterally.
Which is, I suspect, the point - to weaken those viewpoints.
And to address others in this thread around US actions around the world, I am critical of the U.S. war on Afghanistan and the second Iraq war as well as the Israeli attacks on Gaza.
One can be critical of a government without despising it.
And not that perhaps my point is to highlight the opposite effect, by which the continued rhetoric of anti-Zionism as distinct from anti-Semetism weakens the voices of those experiencing a documented rise in genuine anti-Semitism by dismissing it as mislabeling?
Polarization around the human tendency for tribalism and side picking has led to increases in both anti-Muslim and antisemitism - people have been stabbed, had homes invaded, attacked, etc because of both those identities as rhetoric has become increasingly inflamed.
As I said - the times that I tend to see good faith discussion on this topic typically correlate with the voices that recognize the humanity of the civilians on both sides of the conflict, with the voices unilaterally humanizing one side while dismissing the suffering of the other side far more often tending to extend significantly greater underlying biases.
Denying the rise of antisemitism and trying to label it all as simply Zionism upset it isn't in favor has its own impact of conversation weakening I'd encourage you to consider.
To me, it seems pretty easy to both recognize that there's been a marked increase in antisemitism and anti-Muslim rhetoric tied to this topic without impacting my ability to both recognize and condemn actions of people in power in this conflict when targeting civilians or not taking internationally recognized measures to prevent civilian harm.