I can't see any reason why a Catholic person needs to worry about that. The two Orthodox Churches which once were one, are now in canonical communion. Moreover, the both are Russian churches. There are no differences in their teachings, in such situation a split is a sin. "I believe in one Church..."
if Bush were to attend the installation of Washington’s new cardinal.
I heard news that Putin took part in the negotiations. Anyway, ROCOR retains its legal status, property, etc, so no there is need to worry for anyone.
putin did not take part in negotiations.