I agree with you on most of this. The third knew about the coup and as a leader of the village had a duty to protect it but also as a leader, he has the responsibility of looking for the most diplomatic solution. He simply shouldve arranged to meet with fugaku and have a talk and understamding with him, if and only if, fugaku was still hostile after the meeting then he shouldve taken the measures he did. All that being said, the coup had nothing to do with sasuke and I highly doubt every single uchiha was part of it, there mustve been children sasukes age or you ger that were slaughtered simply because they belonged to the family they did. What konoha did was nothing but cold murder. People seem to think that sasuke was the only kid in the uchiha at the time, ehich common sense says simply isnt true. Therefore konoha slayed innocents to save thier own skin and didnt even try to pursue a diplomatic solution. This is why they kept the truth from the villagers. People can say all they want but it was simply murder or genocide. So yes, konoha betrayed him when he was just a boy. And to everyone who says that danzo or hiruzen did, not konoha, keep in mind one was an elder or the village, the other a hokage, they speak and represent the village, their actions are the actions of the village.
