Who is answered in the first sentence of the article posted:
"WikiLeaks struggled to stay online Friday as corporations and governments moved to cut its access to the Internet..."
Why couldn't be more obvious.
Corporations and governments are not conducting the attacks. They might be bankrolling them or using intelligence to perform them, but they’re not the actual aggressors here.
I agree that the why is pretty obvious, but the motive for shutting this down is unclear to me. This benefits the leftists who are trying to bring about a new world order.
“corporations”, I suppose, are Google, Amazon, GoDaddy, etc who can be destroyed by Obama/Boehner if the dont cooperate; and GE/Bank of America, etc, who will soon be destroyed when memos of secret deals are released.