The existence of Israel is a manifestation of European antisemitism, both historically justifying the project of Zionism and European governments continuing to fund Israel instead of addressing the core role of antisemitism in maintaining (at least) the conservative elements of the neoliberal order.
If antisemitism props up Israel, then a core part of dismantling Israel (and thus saving the lives of Palestinians) is addressing European antisemitism. There are Israeli Jews who would leave if they felt safe to do so. There are Jews demanding Israel be armed, because they don't feel safe anywhere else.
Protest, boycott, take whatever action you feel is appropriate. There is a limit to your ability to convince governments to stop funding genocide, but you can learn about antisemitism and you can work to fight it, especially within "The Left." You can learn to distinguish between legitimate critiques of Israel, and antisemitic ones, and you can stand and call out antisemitic ones.
Honestly, this is some of the easy work that I think a lot of people don't consider even doing, don't even realize it is a thing that can be done.
I'm talking to Israeli folks who identify as being on the Left. It's hard because they've been through a lot of propaganda. Israel is a cult that terrorizes its members. This is important work that can have a huge impact, because it focuses on dismantling the networks of support that reinforce what's happening now.
Meanwhile, I still run into wild things like "Rothschild" conspiracy theories among people who identify with the idea of supporting Palestinians.
Not only can you support the liberation of Palestine and the Palestinian people while opposing antisemitism, but you must actually do both in order to do either. They are exactly the same fight, and anything short of both is thrashing against oneself.