Most employees would have been oblivious unless some SJW hadn't gone digging and publicized it. They'd happily worked under the man for 6 years after the donation and before he was forced out.
The separation is necessary is there to protect people from being fired for having unpopular opinions because it's not an argument we want to follow to it's logical conclusion. If I wanted to donate to an anti-circumcision campaign am I unfit to be CEO because I might alienate circumcised people and religious people? If I want to donate to an atheist cause am I unfit because I will alienate religious people? If I donate to a feminist campaign am I unfit because I might alienate MRA's?
The separation is necessary is there to protect people from being fired for having unpopular opinions because it's not an argument we want to follow to it's logical conclusion. If I wanted to donate to an anti-circumcision campaign am I unfit to be CEO because I might alienate circumcised people and religious people? If I want to donate to an atheist cause am I unfit because I will alienate religious people? If I donate to a feminist campaign am I unfit because I might alienate MRA's?
How balkanized do work places have to become?