Were Jews banned from 100+ countries because of the actions of a few bad apples or because a large percentage of Jews acted evilly?
Would it be morally right or wrong to ban Jews in both cases?
They believe they are God's chosen people.
The reason they keep getting ousted from host societies is that their cultural identity is inherently supremacist. Their religion, their history and philosophy and most sacred texts are all built on the idea that they are unique and sacred and that it's their birthright to rule the earth and use the goyim as they please, for we are like animals to them.
No one can tolerate living beside such people, who see it as perfectly acceptable to cheat, lie and enslave others because their culture teaches all are beneath them. It's an effective ethnic survival strategy but it's absolutely anathema to the free and prosperous lives of everyone around them.
Were it not for this they could be welcomed, but supremacy and conquest has become intrinsic to their identity.
Here's a few things to get the noggin joggin.