I've never heard of any of those people, so I'll do some cursory research:
Kompothecras was fired by MTV for making racist and white supremacist comments on social media. MTV is a private company with a brand to protect and he's an independent contractor. What exactly is the objection? MTV isn't in violation of their contract.
Mulroney looks like someone who knows Megan Markle, I have no idea what happened to her, so I'll wait for your explanation.
Peter Hunziker I actually knew because I admit to watching this show. Bravo is a private company with a brand to protect, he made racist posts on social media and was not fired, he actually worked the whole season, they just edited him out and didn't bring him back. Again, what's the objection? They should HAVE to bring him back?
Craig Gore returns too many people to sift through.
Hartley Sawyer made misogynist posts and got fired by a private company who clearly didn't think he was good for their brand.
Adam Rapoport resigned after apparently doing blackface in 2004. He resigned. That's his choice.
Taylor Selfridge has the same history as the first guy.
So what we have here are a bunch of people making posts on social media that their private company employers found them potentially damaging to the brand.
I don't think you can make private companies continue to pay those who are potentially harmful to their market. What is the solution you propose? It's not like these people are cast out of society and homeless, after all, and there's no divine right to continue to get paid to be on television.