This is a broad term that different people might understand differently. Please define it first, then use it.

> politics and religion

This is off-topic. The mentioned discussions and disagreements at SpaceX were unrelated to these matters.

In general, it is in my opinion dangerous to say that an opinion different than the one of the boss is unwelcome at a company. This is how cults and autocracies operate. It amplifies the opinion of the leader and unjustly silences everything else.

Respectful discussions about the topics of disagreement are in my opinion essential for a company to preserve its defined ethical standards and not deteriorate into a community ruled by herd mentality and groupthink influenced predominantly by a single person.