@Berny:
Actually, that's not why it's called the "Dark Ages" (actually, historians don't, but regardless). The name came about due to the almost complete lack of surviving documents about the period, compared to the Romans, who tended to keep meticulous records, and the later middle ages. (In some cases, records were kept, and then lost; more often people didn't bother).
In fact, among people who had enough time to spare, which was mostly royalty and clergy (farming and most other trades were a lot more labor-intensive, as you might expect), science and learning were alive and well, albeit set back somewhat by the loss of Rome. Indeed, some disciplines - engineering, most prominently, but also things like botany and what would become chemistry - advanced quite considerably. And a lot of these developments were due to Christian clergy.
Also, if memory serves, truly mass education (not non-religious education, but education for lower classes) was a Progressive, post-Industrial Revolution concept, but I'd had to look it up.
TL;DR: these anti-intellectual "Christian" twits are actually the exception, not the rule, throughout history.