The US wasn't like this in terms of free speech right off the bat (in both legal and cultural terms), and your historical analogies aren't well-supported. Stali

The US wasn't like this in terms of free speech right off the bat (in both legal and cultural terms), and your historical analogies aren't well-supported. Stalin was able to kill a lot of people due to, inter alia, a lack of what we could term "the rule-of-law", and he did it in part to direct as many resources as possible towards industrialization. Hitler is a demagogue who arguably took advantage of a situation where anyone could say almost anything, and where faith in more standard institutions was low. Nobody is advocating for actually punishing people based on what they say, let alone in as dire a manner as execution, so the examples of Galileo and Moore are irrelevant.