Sudden arising of disgust I was meditating today on accepting and letting go of fear, anger and anxiety (which were very loud in my mind at the time) when suddenly my reactions to these states turned into disgust: whenever anger came up, I quickly became disgusted by it. Same thing happened for fear and anxiety. As soon as I sense the suffering in my thoughts, I become disgusted by them. Why is this happening?
Why is this happening? The mind could be becoming clear &amp; attuned to what is healthy &amp; peaceful. Inner wisdom could be functioning. 

Below is a quote from The Removal of Distracting Thoughts sutta:


  Like a well-dressed young man or woman who feels horrified, humiliated and disgusted because of the carcass of a snake, dog or
  human that is hung round his or her neck...the monk in whom
  unskillful thoughts continue to arise...ponders on the disadvantages
  of unskillful thoughts thus: Truly, these thoughts of mine are
  unskillful, blameworthy and productive of misery. Then the evil,
  unskillful thoughts are eliminated; they disappear. By their
  elimination, the mind stands firm, settles down, becomes unified and
  concentrated, just within (his subject of meditation).


The Fire Sermon describes the liberation that results from clearly seeing the 'fire', burning or oppressiveness of lust, hatred &amp; delusion. In the text, the word translated as "estrangement" is 'nibbindaṃ', which also means 'disgust' or 'revulsion'. 

The quote below explains the word 'nibbindaṃ':


  The more common translation of nibbidā is “disillusionment, disenchantment” but the more serious spiritual practitioners generally
  prefer “revulsion,” even “disgust.”
  
  http://www.themindingcentre.org/dharmafarer/wp-content/uploads/2009/12/20.1-Nibbida-piya.pdf


In some commentaries, 'nibbindaṃ-disgust' (nibbidanupassana-nana) precedes or creates the 'desire for liberation' (muncitukamyata-nana) rather than liberation itself (as found in the scriptures). 

Note: 'Disgust' is not the same as 'hatred/aversion'. 'Disgust' leads to freedom, since it leads to the rejecting, dropping &amp; subsiding of the negative emotion.