I fail to understand what point you are trying to make, or what you are purportedly trying to understand about anti-Semitism.
In this thread, you have been given some rather comprehensive historical explanations for the development and persistence of anti-Semitic attitudes, beliefs, and stereotypes that should have increased your understanding regarding the origins of such prejudice.
Your own direct contact with Jewish people, and your knowledge of the community involvements of Jewish people, seems nil, and you additionally fail to understand the diversity within Judaism which runs the gamut from the ultra Orthodox to secular non-religious Jews. For that reason, you quite erroneously seem to regard Jews as some isolated, insular, and homogeneous, group and, consequently, your solution to the problem of anti-Semitism, if I understand you correctly, is that Jews need to do better PR work by performing more acts of charity in the community.
That Jewish organizations, groups, and individuals, are already quite involved in philanthropic and charitable activities that benefit the entire community, and not just their own group, seems to have escaped your awareness. Are you really unaware of national social agencies, like Jewish Community Services, which functions in much the same way as Catholic Charities, and which provide a wide range of social and charitable services to to the entire community, regardless of religion or race or ethnicity?
It would seem to me that if you are genuinely seeking a greater personal understanding of anti-Semitism, you should start by examining some of the stereotyped views you yourself hold, and how and why you arrived at those opinions. It might also help you to learn more about the considerable diversity within Judaism because, frankly, you don't seem to know much about Jews.
I previously suggested that you look at the Web site of the Anti-Defamation League, an organization specifically dedicated to recognizing anti-Semitism, as well as bigotry and discrimination toward other groups, and to combating it in a variety of ways. You seemingly dismissed that suggestion for reasons that were unclear, but you then posted a video regarding the results of an ADL poll. Again, I would suggest to you that you do go to the ADL Web site and avail yourself of a great deal of current information on this topic in terms of anti-Semitism internationally as well as in the United States.
The first step in trying to understand something is to become aware of how much you do not know. I think several posters here have gone to considerable lengths to help you with that. I've learned a great deal from reading their posts and I hope you have too.
The next step is a process of self-education and there is no one who can do that for you. You are missing a great deal of factual information which can only be remedied by doing some considerable reading on your part. And you might consider making attempts to broaden your own range of social and community contacts so that you have an opportunity to interact with those you want to understand better or learn more about.
Whether anti-Semitism in the U.S. has recently increased by a few percentage points is really irrelevant. It doesn't tell you much at all. A certain percentage of people will always hold prejudicial and discriminatory attitudes toward some group or other, that's what bigotry and scapegoating is all about. And, in difficult economic times, those numbers will go up a little.
If you really want a better understanding of anti-Semitism, the place to start is with yourself.