I can't help thinking that some of what is described as antisemitism is actually the complete opposite. People ask why Israel is held to a higher standard than (e.g.) Sudan. And point to antisemitism as the obvious answer.
Prejudice is about othering, and hating the other. But I think the horror at the actions come from many in the West believing that Jewish people are 'us' not 'them' and Israel is a proper, functioning Western-style democracy. People in the UK don't think Sudanese people, or their governments, are 'us'. They are firmly 'them'. As are, frankly, the people in Gaza and their 'leaders' who were last touched by democracy a very long time ago.
It's like coming home and finding out your sister is a serial killer. You're horrified. If the creepy bloke on the news is one, you don't feel the same. You expected creepy blokes to be likely. You expect your sister to be kind.
I've certainly examined my prejudice. And from my best mate at primary, to the person who delivered my baby and the lovely woman I ran with this morning, my experiences with Jewish people have been broadly positive (in a way I cannot state about culturally Christian people). My family had little flashes of racism but never antisemitism; my grandad was involved in the liberation of the camps and the script in our house growing up was that antisemitism was evil. I still believe Israel actions are horrific and unwarranted.
There is of course a section of vile arseholes who attacked Chinese people in covid, African people when Ebola was in the news, Muslims when the murder happened, women when Andrew Tate speaks, and Jewish people now. Any excuse is a good excuse and Jewish people have more reason to fear that than many people. But antisemitism isn't the whole story.
Many of us are on the 'side' of non-combatants and remembrance of the victims of the October 7th attacks is important. They are innocent victims as much as the dead children in Gaza.