Tom Wigley is one of the world's top climate scientists

That's damning with faint praise. It's springtime. The climate ninnies are out in full force.

I know we aren't supposed to complain about lack of options, but .. on this poll separating zero dollars from the options with greater than zero dollars would have been interesting data to see.

You misunderstand the concept of a "protected class."

Employment law indicates that discrimination or harassment based on protected classifications is illegal. A protected classification is something like "gender," but not "being a woman." So if you discriminate against someone because she's a woman, that's illegal because you're discriminating based on a protected class (gender); and if you discriminate against someone because he's a man, that's ALSO illegal because you yet again are discriminating based on a protected class (gender).

Same thing about race, national origin, and a few other classifications (military service, in a few states sexual orientation, etc).

That doesn't mean, however, that you can't have a charity that focuses on one gender or race, or an organization focused on one gender (e.g. girl scouts or boy scouts); it also doesn't mean that an entity seeking to donate money must donate money equally to all genders -- protected classifications are an area in employment law, not every facet of life.