The issues in my mind are the thought processes that lead him to hold his opinions. Those processes generated a prejudiced world view - one held strongly enough to affect behaviour to extend of spending money to bolster that prejudice.
Are those the thought processes you want in control of one of the world's most impactful technology companies?
He's arguing for compartmentalisation[1]. This is how most religious people handle clashes between religious beliefs and the world: some topics are tagged for a religious worldview (whose defining feature is unassailable dogma), other topics aren't. In his case there's probably a jagged line that separates his professional duties to LGBT people in the tech community vs his political act against other LGBT people via Prop 8. People who are at the intersection (rarebit) threaten this world view, and the best he can do is handle them case by case[2] while trying very hard not to draw more general conclusions.
Are those the thought processes you want in control of one of the world's most impactful technology companies?