Some would say that he is a convicted freedom fighter. Terrorist is a matter of perspective. Murderer...if the guy pulled the trigger he's a murderer. If he ordered the attack he is just as much a murderer as Netanyahu, Sharon, Barak, Olmert - and any other Israeli president you can mention.
U.S. confirms ISIS computer expert killed in air strike (Reuters)
from the article: Why is Israel ignoring the next Palestinian president?