I take it you didn't play LS? You meet the Jedi Masters and they explain why they didn't go to war with the Madalorians, and why you were Exiled. They knew there would be other repercussions from so many deaths, and that it would affect the Jedi via the Force. They were especially concerned with the Exile because of his/her ability to form bonds within the Force, and that the Exile being around so much death could affect several people around him/her. They explained how the Exile had become a wound in the Force, that if exploited could threaten all Jedi, and the Force itself.
They didn't cut you off from the Force initially, but this time around they did want to cut you off from the Force. Kreia steps in and kills all the Jedi Masters.