Originally posted by UCanShootMyNova
Why did you underline the word "communed?" Are you suggesting they asked the Force politely to unbalance itself?How?
What are you even talking about? What does the Jedi knowing about the Sith have to do with the feat?
How do you commune with the Force? Through meditative efforts because the Force is an energy field and not a sentient being. The midichlorians inside you act as the gateway for communication between you and the Force.
They influenced the Force to tilt towards the Dark Side further. Since the Force is not a sentient being, it simply responds to an act of communication the way a Force-user wants it to.
Force-users can use the Force for both life-affirming and destructive ends. Life-affirming acts tilt the Force towards Light Side and destructive acts tilt the Force towards the Dark Side.
Jedi were not aware of this development. They were not even aware of presence of Sith. They only noticed the shift.