As in when did it all start snowballing to a critical point (that point being the massacre). Surely it wasn't durin or directly after tobiramas reign. Hiruzen was a teen when tobirama died, yet the massacre didn't happen till he was much older. So there was a good 50-60 years where everything was calm.
Therefore was the tipping point the kyuubi attack? This would make more sense that the village would be mistrustful of uchiha after the kyuubi attack considering the giant sharingan in the kyuubi's eye and the fact none of them helped defend the village.
Which one was it?