grellas makes two basic arguments in the post I replied to, which I will attempt to summarize:
1) Refusing employment based on beliefs has been historically bad, e.g. Christians refusing to hire or do business with Jews, and blacklists for suspected Communists. Such things are in fact SO bad that they outweigh any/all good that might be done by applying such filters in cases where we feel they're justified.
2) Startup culture specifically is about joining together diverse people to build great things. Even if we stipulate that filtering out business leaders with "bad" political beliefs had some benefit, there's disproportionate harm done by the startups that will not succeed because they handicapped themselves in this way.
I'm not sold on either of those arguments, though I think they both have merit.
Your first point is why I find grellas comment misleading and detracting from the real issues. Those two examples you name, as well as the examples grellas names, are not actually based on beliefs but are based on group membership (or suspected group membership). That would be wrong and I'd agree.
However, this argument is misleading because the featured article is very particular about specific actions by this person and dismissing them based on those grounds, not because Rice belongs to any particular group and attributing all properties and beliefs of that group to her. For instance, while she is responsible for war crimes and torture, we're not automatically assuming she holds the same beliefs as, say, Pol Pot.
Same goes for Brendan Eich, though donating $1k to anti-gay legislation is arguably somewhat less evil than actively supporting and authorizing the torture regime of the world's biggest military power. There's really not a lot of wiggle room there.
Rice did more than just have an opinion and participated in candid discussions. She acted on her opinion.
I can have a candid discussion with people who think that any immigrant should be shot at the border. I will disagree with the person, but everyone is allowed to have what ever political belief they want. However, once they start shooting people, a line is crossed and candid discussions is no longer an option. Those action would also cause repercussions, which has nothing to do with political, religious or other form of believes.
