Eastern Ukraine
According to a 2016 survey of religion in Ukraine held by the Razumkov Center, 73.5% of the population in Eastern Ukraine were Christians (63.2% Eastern Orthodox, 8.1% simply Christians, 1.0% Protestants, and 0.3% Latin Rite Catholics), 0.5% were Muslims, 0.3% were Jewish, and 0.3% were Hindus. Not religious and other believers not identifying with any of the listed major religious institutions constituted about 24.7% of the population. It also showed that approximately 55.6% of the population of eastern Ukraine (which in Razumkov's mapping excluded Donbass and consisted of the regions immediately to the west of it) declared to be believers, while 13.4% declared to be undecided or non-believers, and 3.5% declared to be atheist. 
A 2007 survey by the Razumkov Centre asked "Would you like to have your region separated from Ukraine and joined another state?" In eastern Ukraine, 77.9% of respondents disagreed, 10.4% agreed, and the rest were undecided. 
In a poll conducted by the Kyiv International Institute of Sociology in the first half of February 2014, 25.8% of those polled in East Ukraine believed "Ukraine and Russia must unite into a single state", nationwide this percentage was 12.5%.
Religion in Kazakhstan
Christianity in Kazakhstan is the second most practiced religion after Islam. Most Christian citizens are Russians, and to a lesser extent Ukrainians and Belarusians, who belong to the Russian Orthodox Church. According to a 2009 national census, approximately 26% of the population of Kazakhstan identifies as Christian. 1.5 percent of the population is German, most of whom follow Catholicism or Lutheranism. There are also many Presbyterians, Jehovah's Witnesses, Seventh-day Adventists, and Pentecostals. Methodists, Mennonites, and Mormons have also registered churches with the government. According to the 2009 census, there were 4,214,232 Christians in Kazakhstan. "Kazakhstan is the strange core of traditionalist Catholicism," Catholic writer Ross Douthat stated in 2018.