I don't think the Protestants are doing much better.....
"Czech Republic
International Religious Freedom Report 2003
Released by the Bureau of Democracy, Human Rights and Labor
The Constitution provides for freedom of religion, and the Government generally respects this right in practice.
There was no change in the status of respect for religious freedom during the period covered by this report, and government policy continued to contribute to the generally free practice of religion.
The generally amicable relationship among religions in society contributed to religious freedom.
The U.S. Government discusses religious freedom issues with the Government in the context of its overall dialog and policy of promoting human rights.
Section I. Religious Demography
The country has a total area of 30,379 square miles, and its population is an estimated 10.3 million. The country has a largely homogenous population with a dominant Christian tradition. However, primarily as a result of 40 years of Communist rule between 1948 and 1989, the vast majority of the citizens do not identify themselves as members of any organized religion. In a 2001 opinion poll, 38 percent of respondents claimed to believe in God, while 52 percent identified themselves as atheists. Nearly half of those responding agreed that churches were beneficial to society. There was a revival of interest in religion after the 1989 "Velvet Revolution;" however, the number of those professing religious beliefs or participating in organized religion has fallen steadily since then in almost every region of the country.
An estimated 5 percent of the population attend Catholic services weekly. Most live in the southern Moravian dioceses of Olomouc and Brno. The number of practicing Protestants is even lower (approximately 1 percent of the population). Leaders of the local Muslim community estimate that there are 20,000 to 30,000 Muslims, although Islam has not been registered as an officially recognized religion since the Communist takeover in 1948. There is a mosque in Brno and another in Prague. The Jewish community, which numbers only a few thousand persons, is an officially registered religion due to its recognition by the State before 1989.
Missionaries of various religious groups, including the Church of Jesus Christ of Latter-day Saints (Mormons) and members of Jehovah's Witnesses, are present in the country. Missionaries of various religions generally proselytize without hindrance."
No, before the Soviet Atheisation, the Czechs were Catholics since the Counter-Reformation.