Talk:Tanjiro Kamado/@comment-38465793-20191012140304/@comment-44115571-20191013055949

Going by pure speculation and the facts that are already available, it isn't reaching to say that the Kamado family ancestor wasn't targeted by Muzan and UP1 because first, he wasn't a demon slayer period, active or inactive, and second, he technically didn't even call it a breathing technique, it was kind of a ceremonial dance.

The only logical conclusions would be that either 1) Tanjiro's ancestor taught breathing techniques to all the future demon slayers of the main styles, 2) there were more than just Tanjiro's decendant who learnt a breading technique, but didn't become a demon slayer, or 3) the breathing techniques were developed from the ground up based on stories about the original breathing techniques

With that in mind, it's also very possible that Muzan only stumbled in the Kamado household by luck. Otherwise he would probably not turn Nezuko into a demon, or he would've stayed there longer, or left someone there to make sure nobody survived. he didn't recognize that family as a threat.

Chances are: Muzan fucked up, very, very hard, and now he's paying the consequences.