I should add: I disagree with the author’s apparent equivalence of Fascism and Jew-killing.
They are not the same. Fascism is a political ideology congruent with socialism. It is about theft and envy, and so is a form of worship of the Father of Lies.
Because of this it leads inexorably to the killing of Jews - and also Christians and babies. But Fascism and Jew-hatred are not the same thing.
I think the real reason for Jew killing in these ideologies is this: Jews (for whatever reason) have a disproportionate amount of influence on society. If you can influence society you can change it. But, once these people are in control, they don’t want change—they want things to maintain the status quo at all cost. That is why Jews are often “used” in the early stages of a revolution and then purged once the revolution is successful.
Too many people see that Hitler had personal issues with Jews, and then assume that this is central to Fascist philosophy. It's quite separate, really.