Leave the charity alone.
My two cents. Ok, don't go crazy and start writing them hate mail or anything like that. Maybe even just leave them alone. While I too think it is absurd to not take the money for charity, they have a right to their beliefs just as you or I do. If one of their beliefs is that DnD is evil how could they accept money from the sales of it? It would be like me accepting money from mainly the sales of pornography, or some other area I consider evil. There may be a difference of opinions/viewpoints, but that doesn't mean we have to attack it. They did what they had to do based on their beliefs, just as I'm sure many of you act in accordance with your own beliefs.