I'm kind of conflicted about this. On the one hand I would've thought it were obvious to anyone that a private corporation shouldn't be compelled to conduct bus

I'm kind of conflicted about this. On the one hand I would've thought it were obvious to anyone that a private corporation shouldn't be compelled to conduct business with any other business. But on the other hand domain name registration is exclusively done by private businesses, so effectively this group of private businesses can prevent someone from getting a website even if they chose to run their own servers. In the same way that I think that ISPs shouldn't be in the business of policing the content that individual users consume or produce on the internet, I don't believe registrars should be allowed to discriminate who gets to register a domain based on the political content that's likely to be on that domain. If the domain/connection/server is used for illegal activity then it's the role of police to order companies to take down the servers/connections, but anything less than that should be protected.