Some radical American right-wing groups tend to harbor anti-Semitic attitudes. List other entities (ethnic, religious, etc.) within the U.S. that constitute a regular target for these groups and analyze this phenomenon.
Homosexuals are often the target of far-right extremists, as are ethnic minorities, particularly African-Americans, but including those of Asian or Latino descent, among others. While it is not as common as it used to be, some such groups target Catholics as well as Jews.
Finding someone to hate or blame for one's lot in life is much easier than dealing with one's shortcomings and working to overcome them.
I would definitely argue that radical groups target normally minority groups such as immigrants, who are perceived as a threat in many ways as they come in and take jobs from "normal" Americans and also threaten the cultural hegemony of white Americans. This is something that can be observed in all countries, not just the US.
How are anti-Semitic attitudes and terrorism linked? Is there an implicit linkage of cause and effect in this question? If so, I disagree with the premise. One may be an anti-Semite and hold those philosophies, but that does not a terrorist make. Believing ideas and acting upon them are two different things.
Such groups often present themselves as radically religious in a Christian sense, and so they tend to be intolerant of numerous other religions. Catholics were once the targets of many such groups, but that seems to be less true today. Muslims are much more likely to be targeted today. Gays also tend very much to be the targets of such groups.
(Opinion) The question is deliberately biased. Rather, it should have been phrased:
Groups in the U.S. that harbor Anti-Semitic tendencies often target other groups. Identify religious or ethnic groups that are targeted in a similar fashion.
I can't help but wonder if there was another question with the exact same phrasing, but substituting "radical left-wing" as an identifier? (end of Opinion)
Regardless, Anti-Semites tend to be racist and sexist as well, since those feelings coexist well with each other. Anti-Semites almost always attack Christian and Islamic beliefs because of the integral similarities, and they then project their prejudice onto "different" people. In the U.S., where freedom is extended to all races, religions, and genders, Anti-Semitism is a good identifier of hidden or innate prejudices; in conversation, if it can be kept civil, these beliefs almost always surface.
All minorities are liable to be attacked at a certain period in American history. A few years back in New Jersey, Indians from India were targeted to attack. There was no ostensible reason for this other than they were different. About two years ago, Asian students were bullied in Philadelphia public school. As we dig more, we will find out that all minority at times are targeted by more radical groups.
Immigrant groups, not for the first time, have been the targets of hate groups within the United States, as have Jews, gays and lesbians, African-Americans, and others deemed to be outside the pale of what they define as American. They are out there, though their efforts have been largely curtailed by law, and their message by modern mores.
Many extremist groups are anti-minority. Many are anti-government. You can argue that this comes about because people who join the groups feel that "their" America (dominated by white Christians) is being taken away from them. They feel that minorities and non-Christians and liberal elites are using the government to take away their country. For this reason, they join such groups.