IMHO...anger is about helplessness. our dysphoria is somewhat a product of the same helplessness...it is a feeling that displaces the emptiness
btw...its often in the context of anger at your helplessness to change others that people talk about anger this way (think of parental abuse, cheating/alcoholic spouse)
in our cases it may be kind of the same thing... your helpless "real" self raging at your "fake" self (thats too metaphysical for my taste but it makes some sense)
its a life or death feeling sometimes...this life or death feeling is very often the final straw for those of us that transition....
Kelly is right...anger is blinding..it masks your lifetime of built up wisdom.. why is it everytime i've punched the wall i've regretted it?? (outside of it hurts my hand)