kills someone with a knife, it's a murder, yes, but if it turns out that someone is a Muslim 'avenging' his terrorist brothers in other places, he's a terrorist. There's a perspective that is affected by reason and motive, and not only in Israel. Deal with it.
20 killed, dozens wounded in bombings in Sanaa, Yemen (Reuters)
from the article: Body of U.S. tourist found near Jerusalem; police suspect terror attack