I had to put “Catholic who attends Protestant Bible study” since my mom makes me attend a Seveth-day Adventist study group. Some of it is really good (no one can butcher the Bible THAT badly) but in other parts, I just have to do my best to hold the fury in.
The one time I really blew it, though, was when one lesson was all about how the little horn in Daniel was referring to the Pope and “papal Rome”, and how the Papacy is responsible for the death of 50 million “true Christians” during the Inquisition, and how Napoleon finally crushed this menace in 1798. It was pretty easy for me to successfully refute using secular historical sources, but to imagine how many people were taught this… ugh.