Is this is an appropriate discussion for CD? That is for the list owner to decide. This is not a democracy.
As for as First is concerned. They already have a code of conduct in place. I think that should be as for as it goes. You cannot be an advocate for everything. First's mission is STEM.
As far as boycotting a state for what a subset of the people in the state think... I am not sure if I see the difference in that and the bill you are trying to boycott.
In terms of the issue. The conflict between individual's free association rights and the non discrimination of another individual is complicated. I am not sure if it lends itself to a polite forum discussion.