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The ninth rule of the ethics of means and ends is that any effective means is automatically judged by the opposition as being unethical.

"Rules for Radicals: A Practical Primer for Realistic Radicals". Book by Saul Alinsky, p. 35, archive.org. 1971.
The ninth rule of the ethics of means and ends is that any effective means is automatically judged by the opposition as being unethical.