Seeing Jews as an abstraction, not as actual people, is a key part of the antisemitic mindset.
I have read Joshua Bonehill-Paine’s blogpost from April entitled “Inside the Mind of an Antisemite -and How I Escaped It”. It’s a fascinating account of being consumed by hateful, extremist ideology. You know what’s not in there? An apology. To Luciana Berger or the wider Jewish community