Surely a company choosing not to publish certain material falls under the umbrella of their free speech rights? Or are we all for compelled speech now? If someone has a podcast that Spotify carries and then say they think the Holocaust was a good thing, is Spotify committing a sin by removing that episode or kicking that person off their platform?
Pro tip: needing to make up a scenario of Nazis usually means you're creating a straw man.
Spotify is well within their rights to pick and choose who to platform. I, personally, think de-platforming is counterproductive. Conspiracy theorists like Alex Jones may be trash human beings, but I don't think Spotify having Rogan's interview with him -- which by the way is a lot of Jones looking insane, and Joe challenging him every step of the way -- is in any way equivalent to "Spotify supports Alex Jones." Censoring people just pushes them to echo chambers.