To me, it is always a huge red flag when an article does not properly cite the source. Here is the best I could find: "The figures are published in a report, E

To me, it is always a huge red flag when an article does not properly cite the source. Here is the best I could find: "The figures are published in a report, Europe’s Young Adults and Religion, by Stephen Bullivant, a professor of theology and the sociology of religion at St Mary’s University in London. They are based on data from the European social survey 2014-16." No link to the actual study, which would contain useful information like methodology and sample size. And the latest data is from over a year ago. But they readily reproduce graphs, which show percentages without actual numbers, and leave out important European countries like Italy, which happens to have the Vatican. Based on this, it is a rubbish article, IMHO.