Hiding behind "it's a business" isn't an argument acceptable to most people.
Sure "it's a business" but does that give it a green card to act how it pleases?
We're getting into the philosophy of what we want businesses to be in our society. More and more people are realizing that the inhumane structure a business operates in isn't acceptable to them, and would like to have a say in what they're doing.
This person left Google because Google was getting into the business of killing people - sure you might be comfortable with that. But your opinion isn't any more valid than someone who doesn't work in Google.
So please, stop telling people how to behave and act and protest. We're not putting in 100 hour weeks because someone before you had the audacity to go say the current system is inhumane.
You don't have to be that person, but you also don't have to be the person who stands in their way.