Boycotts to my knowledge , really took on hold for social ( i am including these conservative groups as such) issues during the 60's with the African Americans boycotting the busses right after the rosa parks stuff happened. So MLk jr spear-headed the effort. It was for a good thing.
Now, in an effort to capitalize on the romantic idea of a boycott, we have these bozos. I don't think that it will be an effective boycott NOR last long at all.
But, Ford is a business and has to choose which group they will offend the least. Ford would love to advertize to gay people if not for these bozos trying to stop it.
But harris, we will laugh last. Attitudes are changing all the time and growing more " liberal " as far as acceptance of people goes. So they probably won't be able to pull this kind of thing off in about 20 or 30 years.