It's not a weird comparison. I'll try my best to explain based on your previous comments.
It's not just content being blocked, for example Steven Crowder's youtube channel was changed to only available in unrestricted mode, meaning schools, libraries and public hotspots can't access his channel, even though his channel follows FCC restrictions so it shouldn't be restricted like that, yes The Young Turks swear in almost every video they do and they're not restricted. His channel makes hundreds of thousands of dollars for youtube, so if they cared about money > politics, why would they fuck themselves over like that?
So, what you're describing isn't Crowder's website itself making this decision. The schools are, and that's not what we're talking about. We're talking about what kind of content websites choose to permit on their sites.
It makes perfect sense for YouTube to do this if, by not doing it, they risk the whole entire YouTube site being blocked from students during school hours.
Also, how does an American not understand how freedom of association works? It's not a matter of refusing business based on the orientation of the customer, but rather the nature of the desired service. The straight wedding planner for a gay wedding could be refused service if they're wanting their gay wedding catered, it has zero to do with the customer requesting the service.
If the bakers really were "good capitalists," according to you, then they should provide service to everyone, regardless of their sexual orientation. But of course they don't, and this is for good economic reasoning: they fear losing a broader customer base by associating themselves with gay or queer couples.
Likewise, it could be said that websites with primarily liberal or conservative traffic stand to lose money by entertaining a limited number of oppositional perspectives, which might cause their more regular traffic to dwindle.
So you see, I do understand freedom of association. The internet is still a marketplace.
EDIT: just to be clear, the religious cake company denying service to a gay couple is an actual example, I didn't make it up. As I re-read your comment, I'm not sure we're on the same page.