If you aren't Jewish just shut up. It's not appropriate for people who aren't minorities to lecture to minorities about what is and isn't racism.
Society is generally very poorly educated and bad about recognising antisemitism because a lot of antisemitism is insidious and uses propaganda and stereotypes, in ways society doesn't always recognise as damaging. For example, one of the most dangerous stereotypes about Jews is that we're money grubbing and I've had a lot of people not understand why that's a bad thing, because "surely being good with money is a good thing?" But to understand why this trope exists and why it's so dangerous, requires understanding literally centuries of Jewish history. This stereotype IS very very dangerous and it's literally been used to justify multiple genocides. After the Treaty of Versailles, the German government weaponised this stereotype via massive propaganda campaigns to blame Germany's poverty on Jews hoarding the money, rather than acknowledge their own responsibility for the huge financial penalties forced upon Germany after WWI; that propaganda campaign (which would not have existed if not for centuries of Jews being cast as money grubbing, a stereotype that goes back to the era when Jews were forced into jobs as money lenders, then penalised by Medieval Christians for the jobs they'd forced Jews into) very directly led to the Holocaust.
And I bet anything someone will come along in a minute and accuse me of being yet another Jew who won't stop blathering about the Holocaust.
There's a huge amount of antisemitism wrapped up in antizionism, and a lot of people frankly don't give a fuck about Palestine and are just using it to have a pop at Jews.
Every Jewish person is expected to have an opinion on Israel, is held responsible for Israel, there's been a big wave of antisemitic attacks in the UK over the past few days, in a way that would never happen in any similar situation. The Chinese government literally have concentration camps were religious minorities are tortured and mass murdered (including being killed to order for the illegal organ trade) and it gets almost zero media attention and no Chinese person in the UK would be judged or asked their opinion about the actions of their government, yet Jews - many of whom have no connection to Israel - don't get the same grace.
That's why so much antizionism is antisemitic.
And yet you can't talk about Israel without understanding the history of how Israel was created, and how it's been used as a weapon by geopolitical forces (eg the way the US and USSR used the Middle East as a staging ground for proxy war during the Cold War, or how the USA is using Israel to prevent the Middle East from becoming one big Islamic fundamentalist superstate, or how the US is using Israel as a tactical intelligence centre in the Middle East and how this relates to oil wealth, or how the US religious right extremists support Israel because of Biblical Literalism which is not exactly Jewish-friendly) and how much Jews have been abused and exploited in that process. Israel was created because Europe wanted to get rid of all the Jews after WWII, and not give back all the land and wealth that was stolen from European Jews during the war. I mean Israel was nearly in Uganda for God's sake, no one cared about Jewish people, only getting rid of them.
And people don't understand just how minuscule a minority we are. Jews make up just 0.2% of the world's population. Muslims make up 24% of the world's population, and Christians make up 31%. That is an INSANE disparity.
Plus, Jews only have one single miniscule country to call our own where we can be safe (after centuries of non-stop persecution and multiple genocides). There are nearly FIFTY Muslim countries, and many of those countries are extremely wealthy and could protect and home the entire population of Palestine if they wanted to. The rest of the Arab world has either turned its back on Palestine, or is (in the case of Iran) actively bombing infrastructure in Gaza and funding terrorism that will actively harm Palestinians because Iran wants to kill all Jews, and doesn't care how many Palestinians are hurt or killed in the process.
I'm not defending the actions of the Israeli government, no one I know agrees with the violent oppression and apartheid of the current government. Everyone I know has serious concerns about Israel's swing to the far right and the growing power the ultra-religious have in Israeli politics. And this systemic violent oppression is not just of the Palestinians, but of minority groups within Israel, such as Israeli Bedouin. Systemic violent oppression of Israeli Bedouin by the Israeli government is just as bad, yet somehow the world media don't give the tiniest shit. Most people outside Israel have never even heard of this! And that raises the question, why is the plight of some oppressed people (like Palestinians) a massive worldwide issue, while the plight of other equally oppressed people (like Bedouin, or Muslim Uyghurs in China) goes totally ignored? What political agenda is being served by this cherry picking?