Here is where you're wrong Bill. Alinisky was no more evil than Kalishnokov or Stoner or Browning. He built a weapon, how its used depends on who picks it up. He wrote about power, how its acquired, maintained and lost. His Rules for Radicals should be required reading for any serious student of politics (and was for several of my classes). Also he wasn't an innovator, just a popularizer. The real ideas are found in the writings of Antonio Gramsci (the PHd. Level version of Alinsky) and his inspiration, Niccolo Machiavelli. Alinsky, and especially Gramsci teach us, among other things, to look at the state as a brick wall. Most focus on how high and tall it is. These guys say no, just look at the bricks themselves and the mortar holding them toghther. Find the weak spot, then insert the crowbar. Its not their fault the right never picked up on this any more than its Kalishnakov's fault we never adopted the AK. As I said, Rules for Radicals, The Prison Notebooks and the Prince are weapons. Pick them up and learn from them or don't, but if it comes to challenging state power and you haven't read them, you'll wish you had.
FQ13 who will note that all three are available in paperback and can easily be found used. There is no excuse.
In general, I would agree...but because the weapons a man may create are not evil in themselves, the men, themselves, may or may not be evil depending upon how and why they use the weapons they created.
I use "evil" as a moral label, so what I see as an evil man, others may see as a hero. The legal question is much for cut and dried.
With the way things are going, if major changes do not occur, "our side" might find these works, these weapons, useful for offensive. For defense, it's never a bad thing to be able to read the oppositions playbook.