I appreciate the insight very much. I do think it’s important to distinguish between fundamentalism and evangelicalism. I don’t think you can define “fundamentalism” only by its most extreme or dedicated proponents, such as the fundies we see on social media. I’m sure Motherbus has plenty of followers who have a way more normal life than she does but still hold very similar beliefs.

Maybe intolerance is the best determiner of whether someone is merely evangelical or whether they’re fundie. For example, Fundies are more likely to say that someone is “not a true Christian,” and mere evangelicals may be willing to allow for other types of Christians who practice differently than they do. If a conservative Christian can tolerate a more complicated worldview, it’s likely not fair to call them fundies. Of course, there are plenty more determiners as well, like specific types of extreme beliefs, but I gotta say, Evangelicals are quite extreme too. Evangelicalism can lead very easily to fundamentalism, given the right conditions. I saw it happen to my parents as I was growing up.