One, the wiki is the not an authoritative source and its statements are only based on what was observable for the longest time in-game. Two, who the hell cares? Black elves are harmless, especially when we've had much more insufferable wokisms pumped down our throats for the last few expansions. There are many millennialisms in the current lore, but black elves aren't one of them. They're irrelevant. Third, even if it were one of the more wretched things we had to suffer, it's not a "blasphemy". If you seriously think that, stop being overdramatic and get a real religion and real framework beyond media consumption.