They can only describe those attributes which they see within themselves. They are malignant narcissists, and do not understand that they are looking in the mirror. They cannot fathom within themselves that their good intentions could possibly cause any harm. So the faults and failures of their intentions must therefore be blamed on whomever opposes their programs. They cannot conceptualize that they must look at themselves first when they fail.
Ultimately they are utopian totalitarianists. Their utopia cannot be achieved unless they have squelched any opposition and have 100% compliance with their program. Leftists are the ultimate fascists, whos goal (just like islamic militants) is the universal supremacy of their ideology by whatever means necessary.
Post #135 above is just about the best analysis of the DU-type 'Rat that I've ever seen.