If you truly find it abhorrent then I think it's fine to continue to call it out. Since this was a position also held by the majority of California voters, or, to reuse my example above, Barack Obama, I find it hard to give much credence to the idea of it being an example of "abhorrent bigotry".

I was alive and an adult as of 2008, and I didn't live in California, but I remember this situation. At the time, I was a somewhat naive young libertarian and my thought was that this was a great time to get the government out of the marriage business completely; leave marriage to churches and have the government only involved in the civil union aspect, which more naturally generalizes to gay marriage as well as certain conservatorship relationships or even polyamory, without forcing any cultural or religious shifts. So had I been in California at the time, I might well have voted for this measure, but I do not feel that I was a bigot for this, much less an abhorrent bigot. Since Eich never made and has never made public statements in any direction, we have literally no idea what his actual views on the subject were.