Maybe I don't understand English but what I read is that they do NOT support the DDOS. They realized people were doing it because of them and is asking them to stop.
I think you're blinded by your hatred toward a political candidate. Wikileaks is not a perfect organization but also does not have access to all the secrets of everyone. It just happen to have more about Hillary, probably because more people have something against her or her party and thus Wikileaks get more data (because, let me spell that for you: more people hack Hillary's party stuff. Plain simple.)
Basic demand & availability laws.