Being deemed an antisemite and banned by a Mod in a Lemmy community isn't the powerful argument you seem to think it is.
Considering that people are being accused of being antisemite if they demonstrate against the murder of children (an accusation which, curiously, implies that murdering children is a Jewish thing to do, making that accusation itself being the true antisemitism), that ban probably says a lot more about said Mod than about the person banned.