I'd say yes. Incessant and unproductive noise from certain people can sap other people's ability to focus on work. But that's probably because I've read about the preface you've omitted here. I know some of the context. And I'm thus probably biased in my answer. In an ideal world, I'd likely have said "no, one should not silence people on a project that has no central authority". Then again, Bitcoin core is just one implementation of the project (albeit the only one seriously being used), nothing keeps dissidents from starting their own implementation and try to get it adopted by the majority of people. One can moderate within a certain implementation, in theory, its effect does not reach outside of this specific implementation. Any company can refuse service to someone else, that does not infringe on someone's freedom of speech. But due to the very specific nature of Bitcoin core, it's hard to really decide on yes or no.