Did the early converts from paganism go back to their pagan religion when persecution came?

Les teaches that even new believers, just recently saved out of pagan backgrounds, died for their faith and did not go back into paganism. He adds that it would have seemed awful easy to do. He contrasts that with Christianity today, asking how many professing Christians, even after being taught and tutored for 25, 30, or 40 years, would stay if persecution came and their life was on the line. Les pictures looking over a congregation the next Sunday morning and wondering how many would go with us if a heavy hand of persecution fell; he thinks we would be kind of surprised. He explains this is what Paul was talking about: all his converts, not only in Galatia but also in Philippi, Thessalonica, Berea, Athens, Corinth, and Rome, any place Paul ministered and had converts out of paganism, immediately came under the pressure of persecution. In the Corinthian letters, Paul did not really encourage marriage because it is easier to die for your faith if you are single than if you have a loved one to worry about; that was his only reason. Before salvation, they knew not God, were steeped in pagan darkness, did service, and worshipped pagan gods who by nature were not gods at all, nothing but wood or stone.