Hagoromo's blood is what made the Uchiha, and Senju (Ashura, and Indra)so what counter does Hagoromo have?
Sorry bro, I can't sit on the chair , and argue with you all day.. especially when you keep begging for manga scans.. when you can easily go to those incidents, where Tobirama explains how the uchiha's sharingan works.. and where Jiraiya explains Naruto how genjutsu works as a whole..
Koto/Tsukuyomi/all genjutsu = can be countered the same way.

Still the stipulation Itachi mentioned in Pt.1.