As in all things, you have to look at the totality of the circumstances affecting the two groups.  The Orthodox church was in the east, where the Renaissance did not develop, not did those areas participate in much of the social and economic advances that the Catholics and Protestants shared in the West.  In the East when they did have contact with Catholics, it was mostly because they were under the thumb of a Catholic empire (the Habsbugs, etc.)  and local minority Catholics took full advantage of their patrons in Vienna, et al. to treat the locals badly.    It's not surprising Orthodox feel, in the great scheme of things, they have have little in common with Catholics.  To be fair, to the average western Catholic without much foundation in theology, there seems to be little in common with the Orthodox as well; and certainly far less there is with Protestants.