Genuine question: how was MCU Billy written with antisemitic intent?
It happens in Ep6. Billy Kaplan is the one that's Jewish, which is nothing wrong with that (But it's heavy on the cultural appropriation for a goy to read from the Torah). It starts out fine, until Billy Kaplan dies in the car crash.
Billy Maximoff is Christian through implication (celebrating Christmas instead of Hannukah, Wanda having crosses in her room in the Avengers Towers).
The idea of a Christian boy stealing a Jewish boy's body is antisemitic by default. I don't think the writer knew this or Jac for that matter. Since Jac said that she didn't know anything about Billy at all
That's the antisemitic intent behind it. And before anyone mentions the Kaplans taking Billy Maximoff in, it takes months/years to convert into Judaism