From a 2002 ADL report:

One of the most important findings of ADL’s 2002 Survey of Anti-Semitism in America concerns Hispanic Americans, one of the most significant and fastest growing segments of the American population, in which the poll found an extraordinary gap between those born in the United States and those born abroad. The survey revealed that while 44% of foreign-born Hispanics hold hardcore anti-Semitic beliefs, 20% of Hispanic Americans born in the U.S. fall into the same category.

The anti-Semitic propensities of foreign-born Hispanics were significantly above the national average. Meanwhile, the number of African-Americans with strong anti-Semitic beliefs continued to hold steady at 35%.

“Religious background has always played a role in determining one’s beliefs about Jews. So it is not surprising yet very distressing that one of the fastest growing segments in America holds strongly anti-Semitic views,” said Mr. Foxman. “There is no doubt that this is a reflection of what is being learned about Jews in the schools, churches and communities of Hispanic nations, which is anti-Semitism at its most basic. We need to re-focus our efforts on reaching out to these groups in addition to the larger American public.”