If you're someone who donates to anti-gay causes in their free time and is subsequently surprised that gay people who work for you find that abhorrent enough to out your bigotry to the wider world, then I don't know what to say to you.
Do you deserve to work somewhere where your personal opinions are directly and indirectly causing harm to your coworkers and subordinates? No.
Do you deserve to work somewhere where your personal opinions are directly and indirectly causing harm to your coworkers and subordinates? No.