Anti semitism EXISTS. That does not mean it’s rampant outside of it’s “motherland” ~ Europe and the Middle East.
What I am saying is that anti semitism is most likely percentage wise not so far off in the US...EXCEPT that it is not outwardly expressed and an identified part of the culture as it is in the mideast.
BTW, America’s Christian community until just recently being enamoured of Israel was very antisemetic. It actually came as quite a surpise to American Jews when in the last decade or so, fundamentalist Christians began to support Israel and Jews.