Actually, as much as I despise anti-semitism, the worst form of hatred is anti-Catholicism. Jesus built a Church, and entrusted it with the salvation of souls. Modern Israel cannot confer Grace to save souls. Therefore, as much as Satan hates the race from which the Savior arose, he hates the Church which the Savior founded for the salvation of souls that much more.
Anti-Catholicism is a far greater menace to mankind and the salvation of souls than antisemitism.
But both antisemitism and anti-Catholicism are indeed demonic, and equally to be abhorred.
Grace comes from our Creator not from an institution.