@Narz
I'm not continuing this with you, seen as your post starts with a charitable defense of Rogan, and also ends with condemning anyone put off by his bigoted statements as "stupid". That's not a viewpoint that anyone can meaningfully discuss. You believe the best of Rogan, and immediately the worst of any of his unknown detractors. That's dogma.
People that are worse doesn't mean that other people aren't also bad. You're being charitable, which isn't the same thing as what I was talking about r.e. centrists. I still consider your charity massively misplaced, and bear in mind that was just one example. He consistently courts alt-right and right-wing personalities, and while he may reach out to centrist and nominally left-leaning folks (when the best examples I can Google involve Russel Brand and Louis Theroux, I mean, sure, better than ol' Milo, but not what anyone outside of America would call actually leftist), he definitely slants an obvious way.
The point about his audience (that you didn't bring up, but I'm crossing the streams with the point below a bit, hah) is significant. If he has a large audience, it's far more likely that that audience, if swept under a Sanders voting block, would influence the existing voting block more than that block would influence them. Especially if the cultural lynchpin that spreads these views is Rogan himself (not Sanders - importantly).
You don't have to be mean-spirited or hateful to be discriminatory against minorities. In fact, that's what makes airing such views so dangerous - people focus on the tone of the message, rather than it's actual meaning.
Whether or not his audience is massive and his endorsement will actually translate that audience into a Sanders-candidate set of votes remains to be seen. It's one thing to take Rogan on merit. It's another thing to assuming a future positive voting block for Sanders - especially if you're not going to consider any votes lost by the same endorsement.
This isn't purity politics, and it's not like marginalised people are some singular entity that all have the same opinion, but I've seen enough pushback for it to be a perfectly valid stance to take. These are the people you should be courting, not because they're possible maybe Sanders votes. They're actual Sanders votes. Many of them (in my curated social media, anecdotal) will still vote Sanders assuming the opposite is Trump, but that doesn't mean we can't be cautious of Rogan's worse views (and repeated interviewees) impacting Sanders' progressive base.
Rogan himself had claimed (long before this drama) that Biden and other "centrists" had asked him many times to be on his show, but he declined because he only invites (political?) people he respects*. So let's not act like the Biden/Warren/similar people would hate it if Rogan had endorsed them
I think Rogan is funny - something like a well-meaning average american, with a decent intellect and respect for others. Compared to what media people usually are (utter garbage) he comes across as very good in his job.
*which, of course, doesn't mean he doesn't invite people I personally find hideous. Eg Ben Shapiro. Btw, Ben cancelled the show with Rogan, after Rogan endorsed Sanders,