.....
During the 70 years of the Soviet time (1917–1987) many Catholic faithful lost their lives, were persecuted or sent to imprisonment for their faith.[18] Besides being Christian, the Catholics had an additional stigma by belonging to a denomination that, unlike the Orthodox Christians, was (and still is) not considered indigenously Russian. By the end of the 1930s, there were only two functioning Catholic churches in the USSR: the Church of St. Louis in Moscow and the Church of Our Lady of Lourdes in St. Petersburg.[18]
That sounds nationalistic, rather than atheistic.
However, religious persecution wasn't very new news in the 20th century, and certainly isn't restricted to secular government.
["When
Judea fell under the authority of the
Seleucid Empire, the process of
Hellenization was enforced by law.
[1] This effectively meant requiring pagan religious practice.
[2] In 167 BCE Jewish sacrifice was forbidden, sabbaths and feasts were banned and
circumcision was outlawed."]
https://en.wikipedia.org/wiki/Persecution_of_Jews
["The Christian persecution of
Roman religion under Theodosius I began in 381, after the first couple of years of his reign in the Eastern Roman Empire. In the 380s, Theodosius I reiterated Constantine's ban on former customs of
Roman religion, prohibited
haruspicy on pain of death, pioneered the criminalization of magistrates who did not enforce laws against
polytheism, broke up some
pagan associations and tolerated attacks on
Roman temples."]
https://en.wikipedia.org/wiki/Theodosius_I#Proscription_of_Hellenistic_religion
["Anti-protestantism dates back to before the
Protestant Reformation itself, as various pre-Protestant groups such as
Arnoldists,
Waldensians,
Hussites and
Lollards were persecuted in
Roman Catholic Europe."]
https://en.wikipedia.org/wiki/Anti-Protestantism
["Institutional
Anti-Catholicism in the United Kingdom has its origins in the
English and
Irish Reformations under King
Henry VIII and the
Scottish Reformation led by
John Knox. Within
England the
Act of Supremacy 1534 declared the English crown to be "the only supreme head on earth of the Church in England" in place of the pope."]
https://en.wikipedia.org/wiki/Anti-Catholicism_in_the_United_Kingdom
["This article gives a historical overview of Christian positions on
Persecution of Christians, persecutions by Christians,
religious persecution and
toleration. Christian theologians like
Augustine of Hippo and
Thomas Aquinas legitimized religious persecution to various extents, and during the
Late Antiquity and the
Middle Ages, Christians considered
heresy and
dissent to be punishable offences."]
https://en.wikipedia.org/wiki/History_of_Christian_thought_on_persecution_and_tolerance
and it hasn't stopped with religion vs rival religion
["Atheists and other religious skeptics suffer persecution or discrimination in many parts of the world and in at least seven nations can be executed if their beliefs become known, according to a report issued on Monday."]
https://www.reuters.com/article/us-...n-discrimination-report-idUSBRE8B900520121210
people were encouraged to denounce their neighbors, and often did so to ensure safety for themselves or to gain their neighbor’s room for themselves after they had them evicted or imprisoned.
Not unlike US Homeland Security post 9/11
Or Medici Italy. Or Nazi Germany. Or Inquisition Spain. Or...
And again, hardly relevant to freedom from religion.