The Mozilla CEO Resignation

I read today that the Mozilla CEO has stepped down amid controversy.

I was asking myself what I feel about it. I count myself amongst the gay rights support group but I don’t see myself endorsing this.
Isn’t the man entitled to his opinion? And do all our opinions necessarily need to converge? If you are a senior executive of a large company, does it mean you cannot express any personal views for fear that every view might impact the brand?