Marwan Barghouti was and still is strictly opposed to targeting civilians INSIDE ISRAEL. His attacks were only targeted at the occupation army and the illegal israeli settlers (who, please admit it, during the intifada acted just as bad as palestinian terrorists, kniffing, attempting to place bombs, sniping a girl in the head for free...) Now whether you like it or not, under International Law Barghouti is not a terrorist. International law guarantees the right to resist occupation wich is what he did. Only Israel considers him terrorist and as Bradley points out, in the current situation releasing him will actually help you.
U.S. confirms ISIS computer expert killed in air strike (Reuters)
from the article: Free Barghouti Now