Are they evil?

No.

Even though I occasionally refer to zombies as the "evil undead", I don't think they are actually evil, and I feel the need to clarify. In my opinion, evilness is the result of intentional malevonence. The zombies and the virus that causes zombies has no thought process and therefore no intent and consequently, is not evil (by definition).

Despite the lack of evil, this is no reason to feel sympathy for the rising undead hordes. They are still incredibly bad for the human race, and a complete abomination. I still advocate putting them down as quickly as possible, with no remorse.

However, I will probably continue to use the misnomer, "evil undead", for dramatic effect.