You might recall in chapter 7 of The Parasitic Mind wherein I referenced a theory that posits that human reasoning did not evolve to seek truth but to win arguments. Well, when you watched yesterday's reaction by @TheDemocrats, it is a perfect manifestation of that insight. They are not animated by some deontological ideals. Rather, if their opponents cure cancer, they will scream that it is unfair to kill off cancerous cells. The inability of human minds to see beyond their tribal allegiance is a fundamental flaw of the architecture of our reasoning faculty.