By that logic, I'm sure no one working at Mozilla voted for Barack Obama in 2008 when he publicly held a position you now consider in the same ethical category as that a "racist" would hold.
This is not so far removed from saying Mary Jones shouldn't be CEO of Mozilla because she donated to a campaign against CO2 emission restrictions: Again by analogy with a settled political issue, "She's denying Global Warming. You'd be OK if she denied the Holocaust?"