From reading all the discussions on usenet, I get the impression that a lot of catholics feel superior to the Orthodox to the point sometimes of being arrogant.
As to the Orthodox being angry with Catholics, some of them have a reason to be because of some of the terrible things Catholics have done to them in the past. Catholics have never been mistreated by co-religionists until the reformation. Before that, they ruled the roost throughout the west.
Catholics have continued to rub salt in their wounds by their arrogance and sense of superiority. Catholic leaders are trying to promote an atmosphere of forgiveness. It will take time, and I don't know if all the Orthodox will ever be able to come around unless the Catholics show a little more true respect and humility towards them.
Until you have belonged to a religious minority, I don't think you have any idea what it can be like. Catholics in America have experienced being a minority, and they weren't always treated very well. You would think they might have learned something from that. They still look down their noses on the Protestants.
As far as that goes, the Orthodox look down their noses at the Protestants, too, judging from some of their rhetoric on their own newsgroup. Not all of them are like that, but some of them are.