Slavs
Slavs can be further grouped by religion. Orthodox Christianity is practiced by the majority of Slavs. The Orthodox Slavs include the Belarusians, Bulgarians, Macedonians, Montenegrins, Russians, Serbs, and Ukrainians and are defined by Orthodox customs and Cyrillic script as well as their cultural connection to the Byzantine Empire (Serbs also use Latin script on equal terms). Their second most common religion is Roman Catholicism. The Catholic Slavs include Croats, Czechs, Kashubs, Moravians, Poles, Silesians, Slovaks, Slovenes, and Sorbs and are defined by their Latinate influence and heritage and connection to Western Europe. There are also substantial Protestant and Lutheran minorities especially amongst the West Slavs, such as the historical Bohemian (Czech) Hussites.
Ukraine
Similar historical cleavages also remain evident at the level of individual social identification. Attitudes toward the most important political issue, relations with Russia, differed strongly between Lviv, identifying more with Ukrainian nationalism and the Ukrainian Greek Catholic Church, and Donetsk, predominantly Russian orientated and favourable to the Soviet era, while in central and southern Ukraine, as well as Kiev, such divisions were less important and there was less antipathy toward people from other regions (a poll by the Research & Branding Group held March 2010 showed that the attitude of the citizens of Donetsk to the citizens of Lviv was 79% positive and that the attitude of the citizens of Lviv to the citizens of Donetsk was 88% positive). However, all were united by an overarching Ukrainian identity based on shared economic difficulties, showing that other attitudes are determined more by culture and politics than by demographic differences. Surveys of regional identities in Ukraine have shown that the feeling of belonging to a "Soviet identity" is strongest in the Donbas (about 40%) and the Crimea (about 30%).