what is relationship between economic completion and prejudice?

I don't think you can simplify prejudice down to just one issue, although clearly economics plays a role. The history of immigration in America is one where the newest immigrants were always regarded with suspicion, and economics was part of this, because the new immigrants, coming often from severe poverty and struggling to survive in a new culture, were willing to work for lower wages. Thus, they represented a threat to those at the lowest echelons of the economic scale. After the Civil War, when the slaves were freed, they now were competition for the poor whites who were struggling to survive. A lot of the support for the Ku Klux Klan came from these poor whites, who had never themselves owned slaves, but who were very threatened by the freed blacks who they now had to compete with.

However, I can't say that I see all prejudice as based in economic issues or subject to economic solutions. To some extent, I think prejudice grows out of innate tendencies, which you certainly see throughout the animal kingdom, to be suspicious of "strangers" of their own species. Gerbils will actually attempt to kill strange gerbils that are put in their cage. These instincts may be rooted in survival, but many species tend to be threatened by an influx of different members of their own species. This behavior can be modified. Dogs can be trained to get over their instinctive tendency to growl, bark, or attack strange dogs, through a process of socialization and rewards. This kind of socialization generally needs to take place when the dog is young. (Interestingly, some studies have shown that even dogs can develop a preference for people of a certain race -- those who look like their owners -- and a suspicion of people of other races, if the dogs are raised in a segregated environment where they are rarely exposed to people of different races.)

Humans can also learn to overcome their innate suspicion of differentness. Children raised in metropolitan areas where they establish relationships with people of different races and cultures will tend to be comfortable with a wider range of people. Just living among diversity doesn't do the trick, however. They actually have to be in a position to develop friendships, spend time in each other's homes, that sort of thing. If white kids and black kids see each other only in school and then go home to separate lives in separate neighborhoods, a feeling of suspicion about differences that can't be bridged. If parents want to raise kids who are more color-blind, the parents have to also get involved in the process, which may mean overcoming some of their own feelings and prejudices.

People who are raised in a basically segregated, mono-cultural environment will struggle more as adults with developing comfortable relationships of those of other races and cultures. If such people are from a minority group, they may be suspicious of those in the dominant majority. Even under these circumstances, people can change if they are open and willing to change. Unfortunately, not everyone is able to embrace change.

Anyway, I've kind of gone off track of your original question. I guess that in an ideal world where everyone knew that they could survive and therefore faced not economic competition from anyone else, some forms of prejudice would decrease. Even that would be difficult to achieve, but it's a worthy goal.

Criticising Israeli coverage isn't anti Semitic. All Jewish and Arab human beings come from the comparable inventory. with the intention to be anti Semitic you're able to could desire to precise a dislike for the two sides.