For me i dont see issues for charity accepting bitcoins.there is no wrong helping others. as long as they accept it.helping is a good deed.and bitcoin also can exchange to currency so i guess its big help to a charity.
For me you're right. We must not judge those charities that accept bitcoin. However, it is important to know if the it comes to the right beneficiaries. As we donate to charities, we have to assure that everything comes to those who are in need and not to the people who have interest in bitcoins. We always have to be careful to donate to a well trusted charity.