When an egg will produce its own hen. Using Huntington's terminology, you are speaking about two different civilizations here. Thus compatibility would be limited even in the best of times. Add to it a very long and unpleasant past history, and compatibility shrinks to nothing.
Thanks for expressing your narrow point of view.
Speaking as a Pollack, third-generation in this country, there is much compatibility between the Polish and the Russian religious communities, especially the White Russians that fled Russia during the Revolution of 1917 to settle here. Where I'm from the community is approximately half Catholic, half Orthodox, and almost all Slav. Some of my best friends are Orthodox Russians, and though we can still get into the heated arguments over various topics, we are united by one thing... our dislike of Protestants...