It's not as clear-cut as you suggest. You can't just draw lines between his role as CEO of a company and his public stance on an issue and call them separate. It does affect the company and the impression that other employees get. It affects the company culture. It on one hand makes homosexual employees feel that the CEO despises their lifestyle so much, that he's publicly willing to donate to not allow them to lead it. On the other hand, it enables the bullies to take this as a green light since their values (based on hate) reflect that of the CEO.