Then let me rephrase: It is possible to DDOS a site without leaving a trace that clearly shows malicious intent and thus establishes criminal liability. So while most DDOS attacks are indeed motivated to destroy, they are not the clear cut crime that some would like them to be.
I'm not taking sides here, it just occurred to me that portraying DDOS attacks as definite cyber terrorism is a problem in the discussion we have today and I think it's a slippery slope, similar to the "piracy" argument we hear so often.