Picard only lectured Mintakans after their culture had been accidentally contaminated. And how many gods did Kirk kill? Why did he not respect the religion of the Vaal worshippers? And anyway, your definition of 'progressive' is bizarre; having a worldview based on scientific principle and empiricism and not letting one's thinking to be clouded by some ancient myths seems pretty progressive to me.
Progressive as in allowing the freedom to believe and not necessarily denigrate the participants in that beliefs system. That's actually a progressive trait. Tolerance and live and let live. Sure, some beliefs are stupid and reactionary and make no logical sense but in a universe where people can get along with different viewpoints there's room to let people believe stupid things so long as they don't violate Federation law.
