By faithfully recording religious history, practicing the religion and raising their children to believe.
NO religion will be saved. Practicing a particular religion is not sufficient.
Monotheism
Buddhist with 96.4% of the population practicing this religion.
He is a non-practicing catholic
If they are TRULY practicing the Amish religion, they do not need to have child seats installed in horse-drawn carriages.
many
He was a Jew.
A Druid
He was borth Catholic but he is non-practicing.
Luis Suarez is a practicing Catholic.
Jews practiced their religion quite openly during World War 1 in most countries where Jews lived. In Czarist Russia, there were some difficulties in practicing Judaism, but elsewhere it was not an issue. It was during World War 2 that being Jewish became an issue.