What part of relegating "Roman Catholic" to being "a Protestant slur invented to make Catholics foreigners in their English-speaking countries" do you not see contradicted by the fact that it was used by "Rome" herself, even in a most popular catechism for Catholics, and the distinguishing term "Roman" was used prior to the Reformation.
Nor are Prots alone in in calling RCs Roman Catholic, neither is Rome alone alone in claiming to be the "One, Holy Catholic and Apostolic Church."
In the Nicene Creed of faith our Church is described as the "One, Holy Catholic and Apostolic Church": "One" because there can only be one true Church with one head Who is Christ... Each of these titles is limiting in some respects, since they define Christians belonging to particular historical or regional Churches of the Orthodox communion.. .because it has all the proper attributes, the Orthodox Church is the living realization of the One Holy Catholic and Apostolic Church. http://www.antiochian.org/node/17076
You guys use it as a slur. The term has its place.